Ever try to put a real long serpentine belt on by yourself? I've had great luck using them to hold the belt on the pulleys you already have it on till you get to the last one where some of them seem like you need four hands! I like the more springy ones for this as they can reach further to the open hood (make sure hood is secured open as they hurt if pulled down on your head!) if needed and holds the belt before you need bad language to start over again ... smile.
The stiffer black rubber ones are great and cheaper but great for holding up a brake caliper so the weight is not on the flex hose (NOT GOOD!) while you work on those.
_____________________________
I've had to work alone and come up with some tricks, hope it can help you,
Tom Greenleaf - MetroWest Boston - USA
http://www.acsource.com/ _________________________________________
http://www.autoacsystems.com/tomgreenleaf/