@WormGod:
1. Yep.
2. That applies to very few and very specific things (I'd say line height, font sizes, possibly margins?). If you don't touch the UI at all, there's a chance the values will be preserved on a vanilla system, otherwise, the UI does what it's asked to and stomps on it

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TL;DR: Patch ASAP after an update

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3. Depending on how familiar you are with how things works, you have a couple of choices:
a. Install 'em one by one. I'd start with the patches.
b. Merge the tarballs into a single one. You can only concatenate uncompressed tarballs, so, uncompress and recompress yourself (c.f.,
http://trac.ak-team.com/trac/browser...opatch.sh#L170). Nothing should ever clash with what the patches tarball contains, so it's generally safe.
c. Install stuff manually, live in a shell. After all, the only thing the system does with those is
tar xvzf KoboRoot.tgz -C / 
. This is potentially not a great idea for the patches themselves if you do it with Nickel still running, ^^. And most things will require a reboot to take.