Irrlicht Engine

Hi
How can I implement light maps to any mesh within the engine not in the 3d designing software ?
and what is the best free world editor on the net ? I tried the quark software " quake army knife" which is free but couldn't compile the *.map to *.bsp how do you compile it ?
too much questions I ...

Thanks every body
and Hi this was my first post to the forum

hi ;

how can I load a scene made with the irrEdit to my app ?