R4 help

Hi, im somewhat new to the scene and im having no probs using the r4 for playing nds roms (these have all been in none .rar type) My problem is when trying to get gba files to run these come in .rar file, for which i have downloaded the winrar programme and am ok with extracting the files. Where do i need to put the file once its been extracted in order for it to run? do i need a different emulator to run the rom (the only emus i have are those that come on the r4)
thanks for the help, i hope that makes sense?!

R4DS can't run GBA ROMs.

ok, thanks for the reply! i thought it could because of the gba frame in the system folder!

you'd need a slot 2 card if you wanted to play ds and gba games :)