Gpsp definately works cos i am using it on 3.90m33, Make sure it is in your GAME folder and that the kernel for homebrew is set to 390 in recovery, As for dgen i dont know cos i dont have it, but i may dl it to try just incase is does work then i can let you know.
-EDIT- Try this one much more recent and this is the one i use you will need the gba bios but i cant provide them or a link to them.
http://dl.qj.net/Unofficial-gpSP-Kai...5439/catid/122
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