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#11
You'll need to reinitialize the HD in Disk Mgmt (by right clicking on it's identifier on the drive map you scroll down) from GPT to MBR disk. Then you can boot 32 bit XP to try install. It may still require providing the SATA drivers if it doesn't see the HD. Best to see if XP Mode or Virtual Drive works well enough first.
Converting your uEFI/GPT HD Drive setup, will damage the uEFI BIOS & Windows 7 boot.
thanks decided not to install xp after all. Its a shame though because windows xp mode is not nearly as good. I guess there is no way of having win 7 and win xp on separate hdd on the same machine?