You want to paint over Oak cabinets??! Do you know how much they cost??? Do you know that you'll actually 'lessen' the value of your home if you paint that much oak in your house??!
You're breaking my heart. Take a door or drawer w/you into a local Paint Retailer (found in the Yellow Pages under PAINT - REATAIL) and ask them for advice. I'm sure they'll be glad to help you because, well, you're just another customer. BUT, when you leave, they'll be crying too.