CV joint boots

I've got a split one on the driver side. The rubber
still looks good, but it split, I believe, because it
was stretched out a little too much when installed.

The CV joint is still good AFAIK. Would it be hard to
install one myself? I've never done it, but have the
usual tools and do lots of service work on my cars.
I've also heard of "split boot devices" that can
be wrapped around the axle and serve the purpose
of the original boot, after of course removing the
old boot. With these, the job is obviously much easier.
Anybody know about these things? Thanks a bunch.

--
OM