Group pricing

I'm getting frustrated with Group Pricing/Dual Pricing. I have several different groups of customers and I want to be able to offer different pricing and have it show the price when a customer is looking at the product. I see that Group pricing only shows when checking out. Dual Pricing only works with one group. Is there a better way of having group pricing/ dual pricing?
I’ve been looking at ocCommerce’s web site and they have several options to do this. Though my store is small under 100 products, it will be growing quickly over the summer and I really would like to stay with Zen Cart and not switch over to the other cart.

ANY help would be much appreciated.