I do RNG everything on a retail cart. I just use my flashcart to store copies in case my retail cart ever gets lost. (: Yet lo and behold, it's my flashcart that goes and dies on me. ohwell.
Unfortunately I don't have the time to tutor in C-gear RNGing :( But the people at the 5th Gen help thread are very helpful. It's important to read all the relevant guides first, though, in order to be able to ask questions.