I checked it on my old PIII with Win2K/IE5.5 I'll limit my critique to technical remarks, except to say that your layout is very, very large. This can cause problems. Look at your main directory page, for example. The large buttons appear stacked unless I open my browser window (see below)
This could be resolved by using smaller buttons or a fixed width table.
Large graphics aside, the rest of the site seems to be basic HTML, so I didn't encounter any real problems. Other than the size issue, the only other issue I encounted was with the video. I don't have QT7 on my PC and didn't want to load it.