You'll need to install the text mode driver (by pressing F6) when the Windows installation starts. You can download the driver from the location below:
http://support.dell.com/support/downloads/download.aspx?c=us&cs=555&l=en&s=biz&releaseid=R99970&SystemID=PWE_PNT_P3C_2850&os=WNET&osl=en&deviceid=6395&devlib=0&typecnt=3&vercnt=2&formatcnt=3&libid=35&fileid=129538
Extract the driver to a floppy disk, press F6 when Windows installation starts (as the prompt tells you), when prompted, insert the disk.
If you need any help, drop me a line: jdarley(at)gmail(dot)com
Regards,
Jim