diff --git a/programs/system/shell/globals.h b/programs/system/shell/globals.h
index 87e99d3adf..6960f44ba0 100644
--- a/programs/system/shell/globals.h
+++ b/programs/system/shell/globals.h
@@ -1,5 +1,5 @@
 
-#define SHELL_VERSION "0.7.8"
+#define SHELL_VERSION "0.7.8a"
 
 extern char	PATH[256];
 extern char	PARAM[256];
diff --git a/programs/system/shell/modules/module_executable.c b/programs/system/shell/modules/module_executable.c
index ce823ba0f1..11838e07c6 100644
--- a/programs/system/shell/modules/module_executable.c
+++ b/programs/system/shell/modules/module_executable.c
@@ -4,63 +4,68 @@
 int executable_run(char cmd[], char args[])
 {
 
-char	exec[FILENAME_MAX];
-int		result;
+	char	exec[FILENAME_MAX];
+	int		result;
 
-if ( '/' == cmd[0]) // если путь абсолютный
+	if ( '/' == cmd[0]) // if path is absolute
 	{
-	strcpy(exec, cmd);
-
-	if (  !file_check(exec) ) // проверяем существование файла
+		strcpy(exec, cmd);
+		if (!file_check(exec) ) // check file existense
 		{
-		file_not_found(cmd);
-		return FALSE;
+			file_not_found(cmd);
+			return FALSE;
 		}
 	}
-
-else 
+	else 
 	{
-	strcpy(exec, cur_dir); // проверяем файл в текущем каталоге
-	if (exec[strlen(exec)-1] != '/') 
-		strcat(exec, "/"); // add slash
-	strcat(exec, cmd);
-	
-	if ( !file_check(exec) ) // проверяем существование файла
-		{
-		strcpy(exec, "/rd/1/"); // проверяем файл на виртуальном диске
+		strcpy(exec, cur_dir); // check file in current directory
+		if (exec[strlen(exec)-1] != '/') 
+			strcat(exec, "/"); // add slash
 		strcat(exec, cmd);
-			if ( !file_check(exec) ) // проверяем существование файла
-				{
+		
+		if ( !file_check(exec) ) // check file existense
+		{
+			strcpy(exec, "/rd/1/"); // check file on virtual disk
+			strcat(exec, cmd);
+			if ( !file_check(exec) ) // check file existense
+			{
 				file_not_found(cmd);
 				return FALSE;
-				}
+			}
 		}
 	}
 
+	// if file exists:
 
-if ( script_check(exec) )
-	return script_run(exec, args);
-
-/* запуск программы */
-result = program_run(exec, args);
-if (result > 0)
+	// try to run as a program
+	result = program_run(exec, args);
+	if (result > 0)
 	{
-	
-	if ( !program_console(result)  )
+		if ( !program_console(result)  )
 		{
-			LAST_PID = result;
-		#if LANG_ENG
-			printf ("  '%s' started. PID = %d\n\r", cmd, result);
-		#elif LANG_RUS
-			printf ("  '%s' запущен. PID = %d\n\r", cmd, result);
-		#endif
+				LAST_PID = result;
+			#if LANG_ENG
+				printf ("  '%s' started. PID = %d\n\r", cmd, result);
+			#elif LANG_RUS
+				printf ("  '%s' запущен. PID = %d\n\r", cmd, result);
+			#endif
 		}
-	return TRUE;
+		return TRUE;
 	}
-else	
+	else	
 	{
-	file_not_found(cmd);
-	return FALSE;
+		if ( script_check(exec) ) // if file is a valid script
+		{
+			return script_run(exec, args);
+		} else
+		{
+			#if LANG_ENG
+				printf ("Error in '%s' : script must start with #SHS line\n\r", cmd);
+			#elif LANG_RUS
+				printf ("Ошибка в '%s' : скрипт должен начинаться со строчки #SHS\n\r", cmd);
+			#endif
+			return FALSE;
+		}
 	}
 
 }
diff --git a/programs/system/shell/modules/module_program.c b/programs/system/shell/modules/module_program.c
index 666ecb48ee..93c9d0d4e9 100644
--- a/programs/system/shell/modules/module_program.c
+++ b/programs/system/shell/modules/module_program.c
@@ -2,17 +2,17 @@
 int program_run(char cmd[], char param[])
 {
 
-kol_struct70	k70;
+	kol_struct70	k70;
 
-k70.p00 = 7;
-k70.p04 = 0;
-//k70.p08 = (unsigned) param;
-*((unsigned*)&k70 + 2) = (unsigned) param;
-k70.p12 = 0;
-k70.p16 = 0;
-k70.p20 = 0;
-k70.p21 = cmd;
+	k70.p00 = 7;
+	k70.p04 = 0;
+	//k70.p08 = (unsigned) param;
+	*((unsigned*)&k70 + 2) = (unsigned) param;
+	k70.p12 = 0;
+	k70.p16 = 0;
+	k70.p20 = 0;
+	k70.p21 = cmd;
 
-return kol_file_70(&k70);
+	return kol_file_70(&k70);
 }
 
diff --git a/programs/system/shell/modules/module_script.c b/programs/system/shell/modules/module_script.c
index 0594ff8ccc..0b7297e7e9 100644
--- a/programs/system/shell/modules/module_script.c
+++ b/programs/system/shell/modules/module_script.c
@@ -4,23 +4,23 @@
 int script_check(char file[])
 {
 
-kol_struct70	k70;
-char		buf[4];
+	kol_struct70	k70;
+	char		buf[4];
 
-k70.p00 = 0;
-k70.p04 = 0;
-//k70.p08 = 0;
-k70.p12 = 4; // ўшЄрЄ№ 4 срщЄр
-k70.p16 = (unsigned) buf;
-k70.p20 = 0;
-k70.p21 = file;
+	k70.p00 = 0;
+	k70.p04 = 0;
+	//k70.p08 = 0;
+	k70.p12 = 4; // read 4 bytes
+	k70.p16 = (unsigned) buf;
+	k70.p20 = 0;
+	k70.p21 = file;
 
-kol_file_70(&k70);
+	kol_file_70(&k70);
 
-if ( !strcmp(buf, script_sign) )
-	return TRUE;
-else
-	return FALSE;
+	if ( !strcmp(buf, script_sign) ) // if we found the script signature
+		return TRUE;
+	else
+		return FALSE;
 }
 
 /// ===========================================================
@@ -28,78 +28,78 @@ else
 int script_run(char exec[], char args[])
 {
 
-kol_struct70	k70;
-kol_struct_BDVK	bdvk;
-unsigned	result, i;
-unsigned	long long filesize, pos;
-char		*buf; //сєЇхЁ, ъєфр ъюяшЁєхЄё  ёъЁшяЄ
+	kol_struct70	k70;
+	kol_struct_BDVK	bdvk;
+	unsigned	result, i;
+	unsigned	long long filesize, pos;
+	char		*buf; // buffer, where script is copied
 
-k70.p00 = 5;
-k70.p04 = k70.p12 = 0;
-//k70.p08 = 0;
-k70.p16 = (unsigned) &bdvk;
-k70.p20 = 0;
-k70.p21 = exec;
+	k70.p00 = 5;
+	k70.p04 = k70.p12 = 0;
+	//k70.p08 = 0;
+	k70.p16 = (unsigned) &bdvk;
+	k70.p20 = 0;
+	k70.p21 = exec;
 
-result = kol_file_70(&k70); // яюыєўрхь шэЇюЁьрЎш■ ю Їрщых
-if ( 0 != result ) 
-	return FALSE;
+	result = kol_file_70(&k70); // get file info
+	if ( 0 != result ) 
+		return FALSE;
 
-filesize = bdvk.p32; // яюыєўрхь ЁрчьхЁ Їрщыр
+	filesize = bdvk.p32; // get file size
 
-buf = malloc(filesize+256); // may fail for over 4Gb file, but impossible case
-if (NULL == buf)
-	return FALSE;
+	buf = malloc(filesize+256); // may fail for over 4Gb file, but impossible case
+	if (NULL == buf)
+		return FALSE;
 
-buf[filesize]=0;
+	buf[filesize]=0;
 
-k70.p00 = 0;
-k70.p04 = 0;
-//k70.p08 = 0;
-k70.p12 = filesize;
-k70.p16 = (unsigned) buf;
-k70.p20 = 0;
-k70.p21 = exec;
+	k70.p00 = 0;
+	k70.p04 = 0;
+	//k70.p08 = 0;
+	k70.p12 = filesize;
+	k70.p16 = (unsigned) buf;
+	k70.p20 = 0;
+	k70.p21 = exec;
 
-result = kol_file_70(&k70); // ёўшЄ√трхь Їрщы т сєЇхЁ
-if ( 0 != result ) 
-	{
-	free(buf);
-	return FALSE;
-	}
-
-pos = 0;
-
-for (;;) // юсЁрсюЄър ёъЁшяЄр
-	{
-
-	if (pos > filesize)
-		break;
-
-	for (i=0;;i++) // ёўшЄ√трэшх ёЄЁюъш
+	result = kol_file_70(&k70); // read file to the buffer
+	if ( 0 != result ) 
 		{
-		if ((0x0A == buf[pos])||(0x0D == buf[pos])||(0 == buf[pos]))
-			{
-			pos++;
-			CMD[i] = '\0';
-			break;
-			}
-		CMD[i] = buf[pos];
-		pos++;
+		free(buf);
+		return FALSE;
 		}
 
-	if ( 0 == strlen(CMD) ) // яєёЄр  ёЄЁюър
-		continue;
+	pos = 0;
 
-	if ('#' == CMD[0]) // ъюььхэЄрЁшщ
-		continue;
+	for (;;) // script processing
+		{
 
-	command_execute();
+		if (pos > filesize)
+			break;
 
-	}
+		for (i=0;;i++) // reading a string
+			{
+			if ((0x0A == buf[pos])||(0x0D == buf[pos])||(0 == buf[pos]))
+				{
+				pos++;
+				CMD[i] = '\0';
+				break;
+				}
+			CMD[i] = buf[pos];
+			pos++;
+			}
 
-free(buf);
-return TRUE;
+		if ( 0 == strlen(CMD) ) // empty string
+			continue;
+
+		if ('#' == CMD[0]) // comment
+			continue;
+
+		command_execute();
+
+		}
+
+	free(buf);
+	return TRUE;
 }
 
 /// ===========================================================