Yes, I do. I haven't used no$ for a while though. To play a game, open no$, and it will make you choose a game. Go to where you have your rom and open it. Black and White need patches though to get around the anti piracy on the roms. If you don't patch the rom, your game will freeze randomly and your pokemon won't be able to get EXP from battles. To fix it, open up your rom, go to Utility > Cheats > Add New. From here, check the RAW and Action Replay DS boxes. The first code you put in is:
02006F2C 00000000
02180B8C 00000000
The second is:
52006f2c fdd8f1d8
02006f2c 00000000
d2000000 00000000
52180b88 42018811
52180b8c 4770d1fc
12180b8c 000046c0
d2000000 00000000
The top box is where you copy and paste the codes, the second one is what you name them. Name them whatever, it doesn't really matter. After you've added both, click the little check boxes next to them to turn them on, and click OK.