Finally fixed the Vertex Buffer problem. All to do with using a big vertex buffer and using the verts in clumps without taking a whole lock of the entire buffer each time. Much faster now hurrah!
Also found a little strategy/arcade game I really like, might try and see if I can sell it through my website.
And have been playing the Battle Of Britain BF1942 map today which ius absolutely fantatsic. Havent played Giants for a few days now. eeeek.