"could not find battlefield Vietnam installation."

This is what i got when i tried to update the Buggy game with the latest 1.2 patch.

So i uninstalled the game it shows that the game is 0KB.
Have tried to delete registry entries but still no joy...!
So it will not uninstall, and i also tried after that to manual uninstall by deleting the main folder but no joy again.

What can i do, mate had same problem and he had format, Nej! will not be doing this!

Can any one give me a few ideas before i Kill EA games!
Sods law im at a LAN and every one else is playing it Enjoy

Thanks