I saved a mod and over a couple of days it was saving. Then something happened to where I cant save anything to the existing on. When I go to save it seems like it does but it stoped at the preveois on. What happened? I have a new computer Vista at that in the fallout 3 there are no problems.

This is probably better suited to the G.E.C.K forum if it's about problems saving a mod, try asking there.