I found this in a search, I hope it works because I am installing Windows 2000 on my 5100.
Posted by Brian Newbegin on September 16, 2003 at 22:50:27:
In Reply to: Re: ati mobility radeon m7 windows 2000 driver for dell inspiron 5100 posted by polo on August 23, 2003 at 08:49:29:
If you install Windows 2000 on your Inspiron 5100, the video drivers will not work until you follow these steps:
1. Update the bios to Version A22 or after
1a. Follow this link http://support.dell.com/filelib/format.aspx?releaseid=r65450
1b. This file contains an ISO image to be used to create a bootable CDROM image that, when booted from your CDROM drive, will flash your system BIOS. Download the file to a folder on your hard drive, and then run (double-click) it to launch Roxio Easy CD Creator to burn to CD-R media.
1c. Boot up holding the F12 key to boot from CD.
1d. Follow the directions to update the Bios.
2. Update the driver using M7XPA00A.exe
2a. Follow this link http://support.dell.com/filelib/format.aspx?releaseid=r52900 or search the Dell website for this file. Don't worry that it says for XP only. It's not!
2b. Download the driver and then ONLY unzip the files to a location on your harddrive.
2c. Go to Control Panel Add/Update Hardware to install the driver (point to the .inf file).