I've done alot of digging, and there seems to be no real listing of BMWs maps buried in the motronic. I can tell you steptoes mod transformed my 03 GSA. They don't ALL do that anymore!
I found a product that some UK GSers have used (bbpower chip), and the instruction sheet seems to indicate several different settings possible via jumper, but I haven't tried em, so can't be sure. Makes me wonder if the product is mostly just a jumper too! Once I saw the steptoe mod worked so well I quit thinking about it. here is the info for those who wish to pursue it.