See, LiveJournal is split up into two code modules:
livejournal -- generic LiveJournal base, with hooks for site-specific functionality
ljcom -- livejournal.com-specific code, payment processing, and hook implementations
The former is supported. The latter is definitely not, though sometimes I'm nice and tell people how to port over some of our features to their LJ sites. But seriously.... unless you're super friendly and rad like scsi (of http://www.deadjournal.com/), I'm really not going to help you make money that might otherwise be going towards supporting the very people that work on the generic codebase!