Chucky are you talking about the latests relelase with new German mission 3, mission 4, May up dates and Soviet mission 3( night misssion)?
OK if it os just uninstall it.Then copy the downloaded file wherever you kept it( in a separate folder I assume?). and paste it into your Tvst main folder. There just extract it.Don't use administrator right just right click it.Then you;ll see 4 application folders. Install each in turn making sure they are placed in the right folder( mine is C:/Programmes/Lighthouse Interactive/T34 versus Tiger).Each in tunr.Then open the game and you should have the new games into the main menu of the game( the new mission 4 is called Break Red Army Pinchers it's different from what it was before the last release.Don't look in to the Kursk ZeeWolf folder the new missions are not there!
Hope it helps!
Tell me
Cheers Kamerad Hang on
Frinik