A bit unusual this! If it's any help, some years ago I had problems with a Voodoo card overheating. As it was not fitted with a fan, my dealer suggested a processor fan strapped to the card with plastic ties (you know, the same ones you tidy the cables with). It worked a treat. This may be your answer, just make sure that you disconnect those dodgy wires first so you don't short anything out. And it'll probably only cost you a fiver or so!