[Protoclown]

Hey, this is a really stupid question but I haven't played the game in a long time and I've hardly played it at all multiplayer.

This Sunday I'm going to be playing WC3 with some friends of mine, but they don't have the expansion and I do. Do I need to uninstall the expansion to be able to play them or if I just put in my WC3 disc and run off that will it consider me to have the same version of the core game as them?