1. First, understand Windows 7 manages memory and the Page File much better than previous versions of Windows so leaving the defaults as is is not a bad thing - especially on a large drive with plenty of free disk space. That said, I always put my page file as the first thing on my secondary drive. Putting it on a partition on the boot drive really does not offer any performance gains because the drive heads have to stop what they are doing to move to the page file. But if on a second drive, the boot drive can do its thing while the secondary drive's PF can still be accessed. So moving it to a partition on the boot drive is really only for the user's convenience.
2. I think you just need to try it both ways and see what works best for you.
3. There's a trade off - temp files help speed up performance. So having them on the SSD helps performance. But temp files change often so that means there will be lots of R/Ws and that puts wear and tear (electrically speaking) on the SSD. I prefer to put my applications on the SSD - but that's me. And I note I have a decent i7, 8Gb of RAM, and decent HD so a couple extra milliseconds does not bother me.
4. Most "optimization" tweaks are gimmicks and I tend to look with a distrusting eye at programs that promise to make you computer run "better than new" - this is especially true with Windows 7 which, as noted earlier, manages memory and other resources better than all previous versions of Windows. My best advice is to keep your systems updated and patched and keep the clutter under control. I regularly use CCleaner but understand after running a cleaner, boot times are increased for the first boot because many files are not deleted until during the next boot. Also, if you deleted prefetch files, performance will be degraded until you train Windows to your normal use. I never delete my fetch files for that reason - especially since they constantly evolve to meet your habits anyway.
I am always amazed at how some many people assume they know better than the teams of top notch programmers at Microsoft that do nothing without a consensus. That said, Windows is optimized for the "normal" user - and that 's about 90% of us. If you are one of the 5% at either end of the extremes, then these hacks may benefit you, but don't count on it. Sadly, many will swear up and down how much better their systems run, but in most cases, it is the placebo effect, and not true performance gains - just in the head. And even more sad is many of these changes are put in place without backing up critical data or the registry first.