Can't Restart in MS-DOS Mode

[Stan100]

I need to restart Windows XP in MS-DOS mode. I'm installing slackware (dual boot), and I was doing great until this point.

The intructions say to go to "Shut Down", and then, "Restart in MS-DOS mode". Well, my comp lacks this option. I look up how to start up in MS-DOS mode, and the help file says I need to make a bootable DOS floppy. I follow the instructions, and restart my comp.

I see this when my screen starts:

A:\

I type in: cd c:\

It changes for a second, denies me input, then automatically swtiches back to A:\.

Please Help Me!