QUOTE
1) Put all of gptr sites to your favourites.
yes, it is a nice solution. Actually, the one I use.
As Akuma said, if you cannot use your Favorites, I can suggest that you use one of those multi-documents browsers, like CrazyBrowser. There you can set as homepage a group of pages, that will open each in a tab.
It surely keeps your taskbar empty and you don't risk to forget to check a program.
Moreover, you could use it only for get paid programs, while you use IE or something else for your normal surfing.