I use Discjuggler, ofcourse winrar to unrar the filesets and sometimes nero or cdrwin for burning if the files aint DJ compatible (most are Discjuggler though so that program is a MUST). I don't think kazaa has real DC iso's as i never found them on it... better check if it are real DC games by checking it with Daemon tools or something. Are those games about 600 mb+?
GD rom to PC burning is Impossible forget about it. What those guys do is kind of uploading it via DC broadband adapter to PC and then rip files to make the game fit (ie 700mb) on a CDR. I don't know anyone in real life who has the tools and is able to do this, so i stick to downloading.
Get the Utopia boot disk as there are quite some games which require it to start, in particular all games downloaded in .bin .cue format (cdrwin).
anyway check:
http://wumarkus.com/pages/dcfaq.html