dreamcast emu help

ok this is seriously killing me... i have all the system requirements im sure, i can play 360 games on this comp.. but god i just cant get a dreamcast emu to run >_<!!!!

anyways, so heres the problem...
when i use chankast, i can get the emulator to work, but i really don't understand how to get a game running... i have daemon tools but how to use that and what to do after i use daemon tools is such a big blur to me, and whenever i watch tutorial vids, the creator of the vid usually has a different version of daemontools i cant find (i assume they have a different ver cause their daemontools interface looks different from mine and instead of a red small icon i see a blue one on the corner of my screen...)
i already downloaded a bunch of games..i have pop'n'music, jet set radio, space channel 5, etc... the emu is working fine,i just need help understanding how to "insert a game disk"..... help please...

and as for nullDC.. i gave up on that. no matter how many times i reinstall the thing its like im missing a new file everytime.. a few minutes ago i thought i got it then all a sudden an error pops up saying that one of the dll files doesnt contain something... what in the world????

any advice would be great.. i can get almost every other emulator up and running.. but this is wtf...
sorry for bad english :,(

if anyone has facebook please give me the advice there lol name is Tokiko Niko ^_^