Retroactive and Sticky Sigs

[Dan]

I'm looking for a mod that can do two things.

One a Retroactive signature, a retroactive signature will go through all your past posts and add the signature or change your old signature to your new one.

A sticky signature will only apply to future posts and all the previous posts that don't have a signature still won't and the posts with signatures from previous will keep that previous signature and not the new one.

If anyone can make this I'd be a very happy person