Since I haven't seen any action here, I tried to go out and find a regular expression which suited. I've found several libraries, but it turns out there are several flavors of regular expressions. I have tried several which seemed, by their description, that they should work. None have. Some crash the site. I have tried entering them into the default xml, and have also tried to add them programatically.

I am once again asking for a standard Microsoft filename-permissable regular expression which will work in this environment...