I have heard of a couple P->RN courses, but you take a short summer course and then you start 2nd semester of a 4 semester program... assuming you have everything else taken care of. Basically, you're doing a 3 1/2 semester out of 4 semesters of RN school. You might be better off just doing a traditional RN program (of some sort, even accelerated program types)... at least here in California.
What do you get out of this? LVN /Associates? Sounds a bit quick for the RN...