silhouette + technical difficulties.

Hi, I was wondering if there was an easier way to turn a picture into a silhouette rather than using the lasso tool and taking for-ever...? Thanks & I use PS7.

Also, I don't know why, but after the program's been open for awhile, it suddenly stops working properly and the message, "Could not complete program request" comes up and I can't do anything - not even save it! Or, if that doesn't happen, it suddenly shuts down. I don't really get it, because I still have tons of memory left on my comp and it always crashes. blehhh =/ so frustrating...

so if anyone can help me i'd be soooo grateful and i'd love you forever :P