HTML/CSS help with bugs

need help with an HTML website, to get rid of a few bugs. The website is here: [login to view URL] (it's in Dutch, but that's not important since it's only design/layout issues to fix). It consists of 40 pages. There are two problems: 1) if you click around the links to see the pages, you will notice that the positioning is not the same for all pages; it seems to jump around from left to right. It is designed using tables. I need for this entire website to look STABLE, STATIC and not shift from left to right for every page. I will need for all the functionality to be preserved; there is an asp submit button on the top and that must continue to work. There is also a PayPal shop and login feature. All of that must continue to work as before. 2) the link color for the little box on the top right "aanmelden" should be LIGHTER in color (#CCC), but for all pages except the home, it is using the same CSS as the navigation links which are dark grey. I can fix this myself but just don't have time to go through every page. let me know if you need more information. It's fairly urgent to get this complete by the end of this week.