Watermarking different sized files in PS

I saw a thread on this awhile ago with a link to a walkthrough, and now I can't find it, of course, when I need it!

What I'm looking to do is take my logo, and write an action to put it in the corner of different sized files. I remember it had to do with making your logo into a vector file... but then what?

If anyone has the link, I would truly appreciate it. (or wants to take the time to walk me through it themselves :lol

It guess it's on Russell Brown's page at http://www.russellbrow​n.com/tips_tech.html.

Search for the branding tutorial.

I think that was it, downloading now, thanks!