problems with burning, (and i have read the other posts)

Ok, ive tried to burn looney tune racer, and sno cross ,and other games. and have had the same problems. When i convert cdi to nrg, everythings fine, then i copy and get an error. I read one post that said i should wait and not inject the tracks, and just drag and drop in multisession in nero. THe problem with that is, is that it always says the combination of the two is over a gig.
i have the newest form a cdi2nero and nero. I would use diskjuggler but i dont think it works with my tdk 8432,
please help,
thanks