If this is the folder or "folio" you're referring to, I think I'd leave them alone. If you want to sell them in the future, giving the buyer the option to retain them in their original state is best. Once you destroy the "folio" there is no way to put it back into that state. If you leave it alone, the next buyer can do as he pleases.
http://www.ebay.com/sch/i.html?_fro...Sold=1&rt=ncI seem to recall there was also some previous discussion that some of the stamps may not be as pristine as they appear in the folio (i.e. hinged or damaged gum, etc.) which could have an affect on future value.
Of course, these opinions are based on the idea that you want to sell them; if you just want to retain them for your own collection, the choice is, of course, yours.