Alright so, BFME2 and ROTWK installed completely via these instructions.
Run game: bfme2 has stopped working.
So the problem is not in Rotwk, but in bfme2. Looked for the solution concerning the options.ini file, but I already had an options file in my bfme2 folder (not empty as suggested in the topic).
Seems like a rather stupid problem but yeah, does anyone know how to solve?