i was wondering how you would put more than one bsp's into a scenario, like having both blood gulch and beaver creek in one scenario. i have the latest gmax and 3ds max 2010, but im not to good at it, i have lots of plugins like gbxmodel importer, animations importer and a bsp to obj converter and importer. i couldnt find any tutorials on it either. i have xfire if needed to. i would really appreciate help on this

You could have it as mulitple bsps like in a single player level, or you could just have them both in the same skybox by importing the gbx model. So yes, it is possible.

i would like 2 areas for single players, like in the campaign how it switches bsp's in large levels. what would i need to do to make it work though?

Open the scenario tag, and scroll to the bottom. Under Structure BSPs, click "Add". Then, specify the location of your second one. In Sapien, hit CTRL + B to switch BSPs.

thats cool, no moddeling needed. so i can make players teleport between bsp's like in the campaign?

If it's SP your fine with multiple BSPs. But if it's MP then you need to model it into 1. Otherwise when the Host switches BSPs the clients on the other BSP will have problems.