I tried running a few emulators and games on my NDS and I'm finding that some of them dont seem to load.   Just wondering if I do the flashme firmware upgrade, will it solve some of these issue's?   
I currently have the older style NDS along with the Passkey 2( I think) and the M3 (SD version). 
What advantages will I have if I install the firmware upgrade, besides just not having to use the pass key?  Will I be able to run more homebrews etc?
Thanks!