[galaxy-dev] setting per-tools parameters for SGE job runner

Hi, I have galaxy running now with SGE job runners. I also managed to set PATH now using .sge_request. What I want to do now is to set some SGE parameters for some special tools which need special parameters (e.q. a parallel env. ) Is there a way to set them in galaxy (maybe using the job runner URL)? Or do I need to write wrappers? thanks, Andreas