Here are some collected vista/xp keys that might work for you guys.
Vista Home
3YMR2-WMV49-4WD8X-M9WM7-CH4CG
Vista Ultimate
KGFVY-7733B-8WCK9-KTG64-BC7D8
Vista Home Premium
34BKK-QK76Y-WWR7C-QF2M7-2TB37
6DG3Y-99KMR-JQMWD-2QJRJ-RJ34F
2R6WF-KYF88-27HYQ-XTKW2-WQD8Q - 64 bit
Vista Business
3W2Y2-GRRYB-VH76X-KPDXX-XFJ4B
3F6YG-T44KD-T8VB8-FC697-YMTDT -64 bit
Vista Home
3YMR2-WMV49-4WD8X-M9WM7-CH4CG
Vista Ultimate
KGFVY-7733B-8WCK9-KTG64-BC7D8
Vista Home Premium
34BKK-QK76Y-WWR7C-QF2M7-2TB37
6DG3Y-99KMR-JQMWD-2QJRJ-RJ34F
2R6WF-KYF88-27HYQ-XTKW2-WQD8Q - 64 bit
Vista Business
3W2Y2-GRRYB-VH76X-KPDXX-XFJ4B
3F6YG-T44KD-T8VB8-FC697-YMTDT -64 bit