I'm sorry to hear :( I was pretty sure Infinite and xStream are so close, options would probably be more or less the same, and so apprently not :(
But you're right, it's probably even more needed in xStream due to the fact that, often, the host application make an heavy use of plugins and some of them will maybe never be ported to 64 bit, in such a situtation, you really need the 32 bit version.
Sad though, as long as it won't be possible to make a version of skinvue for 64 bit, you will have to use a dual boot system :( Sorry, I should have read better and thought of the fact, those two versions of vue, even if very close aren't exactly the same

Ab