Hi beholder, At a quick glance I would suggest tyding up your main.html. When viewed in 800x600 your screen needs to scroll sideways to see the whole page.
I personally put everything inside a 700px table and any additional tables inside at 100% and work from there.
Check your pm. I have redone your coding and included the coding for you. Its only rough, but it wil give you some idea and you can play around with it
