Some newbie questions

[Develin]

As my previous post seems to be too unstructured and long I'll try again

Hi I'd like to to convert my game to Irrlicht (the power of Irrlicht is really impressive). As my own engine was tile based I wondered it is possible to "convert" (sorry not the right word but anyway) the walkable area of a BSP file (the floor) to a bunch of quads.
This would be important because it is a turn based strategy game in which the creatures may move like on a chess board - so movement,collisions, waling range, etc they all are measured in tiles. Any idea how to do something like that?
Or is there a intelligent way to build a Irrlicht level out of tiles that are arranged in layers (which was the way I did it in my own "engine").

Last but not least - in the tuts there are usually high level objects (like models, complete maps,...) - can you also build such a high level object out of low level objects like triangles, rectangles,etc like in the actual OpenGL/DirectX? (Sure this would be like going back one step but might be useful) - couldn't really find sth like this in the documentation.

Thanx!

[stampsm]

the custom scene node tutorial tells how to build objects polygon by polygon you simply set up all the vertices with each one having a position, UV coordinates, and color
and later in the code you draw the polygons by using the vertices you created earlier
by only modifying a few lines you can set up the custom scene node to draw textured objects not just colored based on the vertice colors but using a loaded texture