I'm not sure of the nature of your question.
1)Are you asking about the BMW engine management software? Some other software?
2) If so, is it made available by BMW to the "general public"?
3) If it is available, can it be installed on a common PC?
(a few other questions then come to mind, such as what connections - serial, usb, other? - drivers included?)
I don't know the answer to the above question - either your's or mine. A quick search on the chaingang website doesn't mention this anywhere. I doubt it - sort of undermines the BMW dealership network.
You might search around a bit yourself, or ask them directly
- someone probably knows the answer.
Chiang Mai, Thailand