hey am not too sure if this will work out.. but jus give it a try..
in acces. in windows menu u got system tools there select system restore.. n select a date prior to u fiddling with the rigistry.. try it but am not sure if this will work 8)
If u exported the registry to somewhere and u know where it is, just double click it and click yes. I thought this to be an adequate reply. Well better wait 4 better answers than this one