Safest/best way to redirect sponsor links

[tigermom]

I am about to start using my own bought content for some of my freesites. I want to promote my own AVS sites down the road, and also have more control over which sponsor to send the traffic to.

I have heard it here before that it's ok to change outgoing links to sponsors after your freesite has been submitted (obviously, not something you can do if you're using sponsor content). What I would like to have is some sort of a way to use a general page where I can switch links through out freesites. Essentially, since I'm using my own content, I want to build up say "teen traffic" from teen freesites and then if I'm not happy with my current teen sponsor, change one file and have the teen traffic sent to a different one.

Now, I know how to do that on PHP pages and on .shtml pages. My question is, what is the best way to do that with freesites, without making my sites look suspect in the eyes of reviewers. Should I create a redirect file on some domain and just work on changing the links in some htaccess redirect there - would that work better?

Any advice is welcome. I want to do the right thing here without risking the reputation that I think I have as a good submitter.