Sorry if this was in the FAQ or somewhere. I looked all over and read a bunch of topics/posts but couldn't find anything specific on adding, let's say; Linked Flickr photos to my signature. So could someone help me out with doing that and having the correct sizes and all?

Any help would be appreciated. :)

Well first you need to go to the "edit" profile section on you're profile. Then select change/edit signature and it's there that you can add photos. On Flickr, say you have a photo you want, above said photo is the action button--clicking that will bring up a list of things you can do, including "view all sizes", when you click on that, you'll be able to shrink the photo to the right size you want.

You then copy the link of that photo (The link should say "static flickr..." in the html), then copying the link. To deeplink it on you're signature you'll need to click the image button on Eurobricks, and paste the link it that slot.

A very good response. When adding images to your signature be sure it follows the signature guidelines here

Thanks was looking for info on this too