adding power windows

I am looking to add power windows to my 97 sunfire. Bought it new with cranks (was in college, not a lot of dough. What can I say..... learn by doing) Is this a major undertaking? Is there any ready made kits out there? Getting ready to go look on internet, but if someone has already been through this, it would help.....

I have seen kits that attach over your existing shafts, but I don't know if they are quality and if they last or not. I know you don't even want to attempt to put factory style in, there's about 6 trillion feet of wire and a hundred relays involved. OK, maybe I exaggerated a LITTLE bit ( ha-ha ), but I think you get my point

Honestly don't know. I have found several kits online, but I really don't know what is the best. I don't want to spend all the money the dealer wants to do it. I guess I have rolled them up and down for about 7 yeast now, I can do it some more.