GBA and SNES Emu for NDS

Is there a way that I can get a GBA emulator into my DS? I have the R4 and I tried putting some GBA games in it but I failed to do so.I also must know if I can put a SNES emulator on my DS. I tried SnesDS but I can't seem to get it working like it should. Somebody please help me.

Yes you can put GBA games on your DS, but not using an R4. You need a flashcart that goes in the GBA slot, not the NDS slot.

snesds is also for slot 2. use snemulds (google it)

Success!!! Thank you so very much comrade! Now I am happy again. :D

I do have a problem though...I want to change the configs because some sprites are missing. How do I configure them and what should I configure. I'm trying to ask what values do I need to input so that the emu can run smoothly. Thanks again.