Product info page table colors and spacing problem

I am developing an art poster and print site. I am have two issues I cannot seem to resolve:

1. Thumbnails and enlargements are several different proportions and dimensions. In some cases, the name of the product and its description overlap the image on its right. I have no right column on the page, just the left and center. I can't seem to find just one existing style or admin setting that will fix this.
2. The product details are in a table (not sure why-assume it's the Zen). The table cells have the Zen light blue bg color that I need to change, but the table has no style applied to it, nor do the cells. I did change the bg color of the centercolumn. I guess I can create a new style, but how do I apply it in the php?

Jack

We need to see it to help you :) .

I have been working, researching since posting this and ---
the table of product details was uploaded using a script. The table, tr and td tags were pre-coded. We're reversing that so we can style with css. I did not upload the products and was not aware of how it was done.

I fixed the spacing issue on the product info pages between the main image on the left and its description table on the right by adding a margin to the image div. I guess that was the best solution. It seems to be working.

http://artbeautiful.com

Thanks, all for now.
Ugh, still lots to do. What a learning curve for a non-developer type like me.