Here is what I do!
Go here
http://imageshack.us/
then click on the resize to the one in which you would like to use I always use the 640X480 size
Click on Browse
Find the file that you want IE Picture and click Open
Then go down where it says host it and click on that
Wait for it to work and then when the page pops up at the very bottom is the last url
Copy that and then go to your signature and go
[IMG] YOUR URL HERE [/IMG] that should do it if you have any problems just ask OK
Hope that is simple enough
