Go to "User CP" up in the right hand corner of the screen, go to "Edit Profile" and in the signature space type in [ url] the address of your album including the http: part [/ url] with no spaces between anything (I had to put spaces here so it wouldn't think I was doing an actual url.

I don't have an address in my signature, so I'm thinking this is how it's done. If this doesn't work, let me know and I'll see what else I can find on how to do this.