The 3 outgoing links on a main page are other than your galleries. On the index/warning you get three outgoing other than your 2257 and exit link as well. This gives plenty of combinations for you to try and sell your sponsors and link back to a hub like greenie pointed out. You can also link back and forth within your main/gallery pages without problems as well just in case someone comes across say gallery2 in a search engine there is a link back to this freesites mainpage and/or gallery1.
Lesa,
I understand that because the links are on the same domain it seems like they are internal. The unfortunate part is if you allowed all links within a complete domain the numbers would be HUGE and quite frankly overwhelming. So put everything ya got on your root and use one outgoing link to it. This way you can change it all ya want whenever ya want without worries as long as its legal
Hope this helps