From your description, it sounds like you need to dig them up and start over. Sometimes it's cheaper and easier.
First off, you need to decide what it is you are trying to accomplish with the roses There are many different types of roses and what you want to accomplish is what you should purchase.
Secondly, you should decide on a landscape plan to include the type of roses you want to include: Tea rose, floribunda, carpet roses, climbing roses, shrub roses, old-fashioned, etc.
Here's a good website to get you started. I also suggest stopping by the bookstore and getting a Sunset Book on Roses. There are a couple of good ones.
http://www.rosemagazine.com/articles...rdeningfaq.asp