In my kind of work (see at the top of this domain) there are times that i need internet explorer. For this reason i have a windows xp partition! Of course the alternative is to use windows xp through virtualbox, but in my laptop i chose to keep this original windows partition.
Another problem is that a lot of web services use specific java version. Some vendor consoles uses java version 1.4, others 1.5 and a few 1.6 !!! This makes my world hell every time.
So how can someone choose a previous java version for his/her browser ?
The solution in fact is extremely easy:
Start -> Settings -> Control Panel -> Java
and then:
Java -> View
and then enable or disable every java version you want.
Take a look on this: