I think you need the Logitech driver to make it work properly, but you can disable the profiler from starting at least and use the Windows game controllers thing to adjust settings.
Blackholemotorsports haven't been around for quite of a long time now. Shame, it hosted much nice files for RBR, tho I think you can still find most of them around somewhere.
The gas pedal problem, I dunno but maybe you should check out the filters and other stuff inside RBR's options. And remember to set both axis and digital since they both matter.