Well, to make glowing text, here's what you do:
Copy this: <table border=0><tr><td style="filter:glow(color=#FFFFFF, strength=4)"><center><font color=#FFFFFF>
TEXT <font></center></td></tr></table>
Into your signature. That will give you white glowing writing. Then go
here They are Hex Codes to choose colors from. There are two spots to enter them: Where it says (color=#FFFFF, strenth=4) and where it says <font color=#FFFFFF> The first one is for the color of the glow, and the second for the color of the text inside.
To put pictures in your signature, here's what you do:
You'll see a button on top that says IMG. Click on it. A screen will come up asking you for a link to the picture. Put the pictures URL in, and you've got a picture.
Hope this helps, Hyperfried