Thanks. Okay, took a look. First things first. Before you start applying any new "look", you need to clean up the old or you are just compounding problems upon problems.
I ran a validation test for HTML on it and there is a lot to clean up. Some of them are things you can't clean, as those came with all the bells and whistles you've included, but a lot of it you can. Begin there.
I saw no borders around anything, but I also saw no references to a centerbar or anything other than your basic layout that is there. No references to a third "column" just sidebar and content.
You also have to work around all those insideWrappers and wrappers within wrappers that are part of the original theme.
I have to get back to work now, so I'm really sorry that I can't help much (I'll try to get back) for now, but if you are not using Firefox, I recommend it, and install the add-on (extension) for Web Developer's tools. It will help a lot as you go through this.
Go through and fix your errors, and that should take you a while. Then put a border around everything, and content and style references within your centerbar column and keep poking at this until you can SEE something. Make sure you hit SHIFT+Refresh button in MSIE in between "takes" or CNTRL+SHIFT+R in Firefox to reload the page completely. Once you can see something, then you can poke at it better.
It's a lot of work. WordPress Themes were supposed to make all this easy, but everyone wants to get their own show going. Which I love. I'm thrilled that WordPress Themes are introducing the exciting stuff of CSS to the world, but it's still a lot of work. And you got some work and learning ahead of you!
Still wish I knew why those other themes weren't working. I tried one of the ones you mentioned and it worked for me. Odd. Good luck and I'll try to check in before heading off for the night.