Surprising you can run Snes9X TYL on 6.35 (pro?) HEN, given that's a static elf and was designed for 1.50 OFW and just about any CFW, and won't run right on newer official firmwares, HEN or not...
In any case, I tried running Snes9X Euphoria on 6.35 Pro HEN, I could load ROMs, but every time I did the emulator froze. Signing wasn't much help, as that just booted me back to XMB.
Your best bet is to downgrade to 6.20 with the signed Davee downgrader and use the signed TN-C HEN, assuming you can downgrade the PSP at all (some people on 3000 series boards couldn't, the downgrader would tell them it was incompatable, although just about any PSP Go mobo version can be downgraded).
Google for all of these and the official 6.20 firmware EBOOT.
Bookmarks