HELP TOTALLy LOST

I want to know if there is a emulator wher i can play any NDS ROMS....... since im a newbie can u please b specific on what i need to do in order to play games im talking bout settings etc etc etc

NO$GBA, DSemu and a few others play DS roms, just open the emulator and click 'file' then open and browse to your ROM. DS emulation is still in early stages so if your rom doesnt work then its likely that it may not be supported.

ok so at least what roms can i play on THOSE EMULATORs

Theres a large list of games that will play and games that wont, you really have to try them for yourself. The websites for those emu's may have lists.