DOS Command Mscdex
Type: External (6.0 and later)
			
			Syntax:
			
			MSCDEX /D:driver [/D:driver2. . .] [/E][/K][/S][/V][/L:letter] 
			[/M:number]
			
			Purpose: Used to gain access to CD-ROM drives. 
			
			Discussion
			
			MSCDEX can be loaded from your AUTOEXEC.BAT file or from the command 
			prompt to gain access to CD-ROM drives. The device driver that came 
			with your CD-ROM must be loaded from your CONFIG.SYS file. This 
			command should not be used after Windows has started.
			
			Options
			
			/D:driver1 [/D:driver2 . . .]
			
			/D:driver specifies the driver signature of the first CD-ROM device 
			driver. This parameter must match the /D switch on the CONFIG.SYS 
			command that starts the corresponding CD-ROM device driver. The 
			MSCDEX command must include at least one /D switch. 
			
			/E - Specifies that the CD-ROM driver be allowed to use expanded 
			memory, if available, to store sector buffers.
			
			/K - Specifies that DOS should recognize CD-ROM volumes encoded in 
			Kanji. By Default, MS-DOS does not recognize Kanji CD-ROM values.
			
			/S - Enables sharing of CD-ROM drives on MS-NET or Windows for 
			Workgroups servers.
			
			/V - Directs MSCDEX to display memory statistics when it starts.
			/L:letter - Specifies the drive letter to assign to the first CD-ROM 
			drive. If you have more than one CD-ROM drive, MS-DOS assigns 
			additional CD-ROM drives subsequent available driver letters.
			
			/M:number Specifies the number of sector buffers.
			 
This page is from http://www.easydos.com. I pasted it on my website to avoid possible broken links. For further help with DOS commands, Check easydos.com out.
