Craig did a little more work on Doom. Here are the current changes of v9 which is not released to the public yet:

-100% fixed sound/music-Doom2 should be ok, i will come on IRC about that.-WAD loader so you can use extra levels or other games that use the doom engine.-Always in 132MHZ mode at the moment-Saves may be worked on, not sure yet same goes for MP3 support.-Not 100% sure if i’m ever going to add cheats…-Random level option.-Looks in GPMM/DOOM for wads now.-GPHeretic coming soon