HTML retained variables cookies

I will be publishing to html multiple large tests (approx. 90 questions each) which need bookmarking set as well as variables retained between sessions until test is submitted. These will all reside on the same domain. I have pared down my retained variables so I come in under the IE 4K cookie limit restriction on each test so far.My question is if the user has started one of the tests, exits without submitting that test and begins another test will IE eventually add all these cookies together to reach the 4K limit therefore wiping out existing retained answers? I have read that selecting Include Title Manager Frame when publishing will store the cookies more economically but bookmarking will not work except to store your last visited page. Am I understanding that correctly? I would like to find out if anyone has any experience with this before I continue down this path to reach a dead end. Any assistance will, as always, be greatly appreciated!Greenhorn