We have friends coming over and I am cooking three racks of ribs from costco. One rack I have marinating with the recipe in this post:

http://www.cougarboard.com/noframes/message.html?id=5510116

It is a balsamic vinegar based rub (it is more of a rub then a marinade, trust me). Basically, you cook these ribs in the oven for 2 hours at 425 then finish them on the grill for a few minutes.

My problem is what to do with the other two racks. I got a recipe from a friend that I know is good, but it requires being cooked in the oven at much lower temperature for about 4 hours. All it requires is bbq sauce and some salt and pepper.

My problem is I only have one oven, and I want both of these to be done around 5 today. Anyone have a recipe that is all on the grill or involves not a lot of cooking in the oven? Any go to ribs recipes out there? Thanks.