@J4ZZ:
Look, thanks for the guide and all! I know my way around using the command line and even worked with linux for a couple of years. But before using anything like that guide I'd like to have some basic stuff cleared out first.

It's almost unbelievable but I haven't found anywhere anyone that explains what all these boot things are actually doing in detail.

I mean, I was happy to read that if I install kernel power with it's supplied bootimg package, then my guess was that I would be able to multiboot just by doing that. Then I read about this u-boot stuff that I know have been around for a while since the earlier power kernels, that it is obviously needed as well. So what does that provide in comparison with bootimg package? What the hell?

Why do I need the bootimg package, why do I need the u-boot package and why do I need both in order to use multiboot with for instance MeeGo on the SD card.

I know this sounds like like very noob stuff, but I haven't found anywhere here someone explaining the boot process in the N900 and why we need this and that in order to get it to work.
It would be much easier to accept such guides if we understand the reason to what the freaking things are doing that we install.
I have read about the universal bootloader earlier, but not really how it fits into the n900. It's not so strange that some ppl cannot follow simple guides if noone really explains what's going on.

Probably it's explained somewhere, but I sure haven't found it and I'm tired of clicking through +100 pages in threads with unrelated stuff or with guides for dummies that says "do it this way" but not explaining how it is supposed to work in just basic terms.
Where can I read about the darned boot process?

BTW, the search bar here at talk.maemo.org is useless junk.
Rant over.