I don't think the Radeon 200 is compatible. They've warned that most laptop Video cards aren't. (it could be but may not be recommended. no Intel video card works with NWN2 but can with emulation).
My laptop is nearly the same as yours and it had a Radeon 300. It didn't work at initial release but they said they would probably support the 300 in the future and it did the very next patch.
Another problem you'll run into is shared memory with the video card and your 512 RAM.