I didn't think that was possible with the engine/dx9..? Adding removing vertices at runtime. This can be done?

From what i've read, i think it's possible in DX9
I sure hope to be right, because i have Win XP and therefore, DX9

This says it's not part of dx9.

http://en.wikipedia.org/wiki/Microsoft_Direct3D#Direct3D_11

Do you need collisions? -> you can't use tesselation and have to do the vertex-transformations on the cpu.

You're right, it can't be done in DX9, i apologize, but it CAN be done with the GameStudio engine
If you go to page 2 of this Thread, you'll see MasterQ32 has done exatcly what i want to achieve, with the 3DGS A8 engine
He shows exatcly what i want to do, i just don't know where and how to start

@Kartoffel - So how will i be able to do these vertex transformations in order to subdivide (or undo subdivision) the mesh's faces, with the 3DGS engine? I can't find anything in the manual nor online regarding this subject. I've found lots of tutorials with C++ but i can't "convert it" to Lite-C, i just don't know where to find the necessary functions/commands and information about them.

Yeah sorry about that - Note-to-self: Actually read the thread before jumping in on it.