Hello Ork, welcome to Seven Forums!
The easiest way to go about this is to boot the Windows 7 installation DVD and starting at Option Two in the tutorial at the link below, mark the Windows 7 partition as "Active"
(not sure which is the Windows 7 partion)
diskpart list disk shows:
disk 0 online 232 gb 160 free
disk 1 nomedia 0 0free
there is only 1 250 gb hd, which had win xp, Windows 7
then run the 3 separate startup repairs discussed in Option One
i cant get it to boot into windows to run these options shown in option one
to write a new set of boot files to the Windows 7 partition.
Startup Repair - Run 3 Separate Times
Be sure to post back with any further questions you may have and to keep us informed.