Go to User CP
Click edit signature
On edit signature page type what you want the link to read and highlight it
Click the button on the tool bar that has the world with the chain link in the window that pops up type in the URL to your gallery or weblog what ever (that is the
www.blahblahblah.com part)....
IF YOU DO NOT HAVE A BUTTON WITH THE WORLD AND CHAIN LINK ON YOUR TOOL BAR FOLLOW THIS STEP 1st!
Co to User CP
Click on edit options
bottom of window go to misc options
Change the box from basic to advanced and click apply then follow directions above!