oh my... that is one busy page.
First off, you are going to have to clean up the ImageReady code that was generated. IR puts lots of spacer images in there that are usually unnecessary, and make all sorts of fun little white lines all over the place. VERY annoying. Of course, you are going to need to know some html for that, so I suggest doing some reading on html tables, maybe over at
www.echoecho.com . (That is, if you don't know how to already.

)
Secondly, there are a lot of animations and tons of switch images on there, which are very impressive when they work right, but you have some issues where if you rollover the buttons, the images get off synch from each other, and really mess up the look of the page.
The iFrame is going to cause lots of problems too, especially across browsers. Right now in Mozilla you have a horizontal scroll bar, and it is causing some breaks in the images where they shouldn't be. It's the same thing in IE.
My suggestion would be to just get rid of the iFrame, and figure out an alternative method, such as making the content scroll down the page. Maybe use a standard layer? Also, you might want to investigate using Flash for the animations, because they are so complex.