To get a picture in your signature, underneath each post you need to upload one from a hosting site, http://www.photobucket.com/ then in your setting area. Not sure about under you details, its called an Avitar, also accessible from your settings area. pretty much the same process i'd guess. There was a post in the suggestions/help section by vwscotsgirl I think. As for your stalling problem I ain't too sure TBH mate, but someone on who knows more about engines than me will be able to help :-)