I'm having trouble viewing the DS and GBA games on my Cyclo DS Evo

So I downloaded like 12 files today and put them all on my sd card, and they wouldn't show up on my game collection screen. They all were downloaded as .rar files and i cant extract from them, i can only copy/paste/delete them, so What should I do??

download and install winrar from www.rarlabs.com, then you will be able to extract them. Additionally, cycloDS cannot play GBA roms without a slot 2 flashcart being present.