[SEARCH] Plugin which forces ppl to complete the profile fields

I'm trying to find a plugin which blocks the forum with an overlay and it prompts a message saying something like "you didn't complete a profile field". Now you're wondering why i didn't make them required on registration, well i added new fields since then which now i need them required for everyone, and the users already registered don't seem to be affected if they're not forced to go on their profile to add what i want.. is there anything out there like this?

I hope I was clear