pretty much everyone i know does what der7tezwerg has suggested, although it would be cool if you could put your own music into the game to avoid that sort of hassel...maybe theres a way, but i have no idea
all i can think of, is maybe a 3rd party program, sort of like a chat bot in LoD, that you could program and send msgs to, to tell it to change tracks in another program ect ect but to do that you would either need another account or to be logged into the same one twice... and um... im pretty sure that violates ccc terms, and at that rate, why not just Minimize d2 and do it the old fashion way?
Sorry im of no help on the subject =( but i am certainly intrested aswell, i hope someone has something worth mentioning to add to this topic, instead of just wasting your time like me =\