Very true, I used to keep as little as possible in the GPMM folder to keep it from being clogged up too much. YAFL requires everything to be in GPMM, but then displays it much better than Pacrom, so throwing everything in GPMM isn't that bad an idea any more.
Maybe the authors of Pacrom/YAFL can get together so YAFL can load the commercial images in GAME too.