i've found the easiest site to use for hosting is photobucket.com because it supplies all the html code you'll need in your signature. so, here's a quick walkthrough:
1. head over to photobucket and sign-up for a free account
2. follow the instructions on the site to upload the picture you'd like to have in your signature
3. once you upload your picture, you should see it on the left side of your screen in a thumbnail view. below the picture should be a couple of lines of html code. highlight and copy the one surrounded by markers
4. head over to the EGO site and go to your settings. there, paste the link you copied into your signature
that should be it - let me know if you run into any problems and we'll see what we can do :-)