I managed to find the file was part of the VIA 4in1 Driver package.
So I donwloaded the 4in1 extracted with win zip to folder and dragged the VIAAGP1.SYS file to a floppy and tranfered it accross to the XP machine and managed to boot into XP Desktop.
Backed work and now going to test HDD for error and then format reinstall.
Thanks for anyone who came for a read tonight. Women eh!.