Just to have this up for any sort of reference...
Sadly can't get into the whole IIDX/Pop'n scene like you guys, so the best I can do is make any clerical fixes until I'm well off enough to import this stuff.
Love the music though.
I guess I can clarify a bit more. The reason I've even come across this stuff starts with when there was a Dance Dance Revolution 3rd Mix machine in the arcade I used to go to. A bit of research over the years and that's more or less how I came across the rest of the games. Though I've only played loads of DDR and a bit of GuitarFreaks/Drummania (Though I did come across/play an IIDX machine once.)