The first ghetto isn't that hard just hold L and spacejump against the wall, holding forward. For the other ghetto's make sure you don't hold L when you land from your ghetto, the chance of sliding of the ledge is pretty big when you hold L, works for other small ledges too.
oh, that will help quite a bit, i think. i didn't have too much trouble getting to the first ledge, but things started to suck after that. thanks.