I installed the following ipk's that I downloaded from your post:
keyhelper_1.2.2-1_arm.ipk
libmad_0.15.0b-zports-0_arm.ipk
libSDL-mixer_1.2.6-zports-0_arm.ipk
libsdl_1.2.5-slzaurus20050410_arm.ipk
snes9x_SDL-2_arm.ipk
zemufe_0.1.1-3ex_arm.ipk
znester_7.1-1_arm.ipk
zpce_0.3.4-1_arm.ipk
I copied keyhelper.xml to /home/zaurus/Documents/custom/
After that installation, znester ran without problems (except for burgertime -- hung znester) with the exception of my screen size/orientation problem.
I never got snes to run. It would hang, and when I terminated the process I would see a message about not being able to find a process(?)...let me know if you want the exact message.
I only tried 1 of the turbografx roms, and it ran, but it was a little slow, and my main concern was trying to get znester working so I didn't play around with it very much.
I am 6 months new to the linux world so am a little slow when it comes to getting better error message details, but if you tell me what commands to run, I can certainly do so.