I won't pretend to have read every single word of this thread, but if you have multiple kernel versions then it's generally a good idea to symlink (typically vmlinuz) to your kernel, and have grub boot from that.
The reason this is a good idea is not for ease of every-day use, but for when things go wrong - boot up your livecd, inspect filesystem and see what kernel it's trying to boot, and change if necessary.
Typically the kernel's own make file will take care of auto-updating the symlink (after "make install").
Yes, you can install multiple kernels simultaneously. The process is trivial and the images have whichever name you decide to give them.
Seriously, read the links above. The sample PKGBUILD recommends using the LOCALVERSION variable to define unique custom names in the form kernel26%LOCALVERSION%. However, you are free to ignore this and use a completely custom name: kernel-2.6.69-energyman-special.
You edited your previous post after I posted mine and thus I didn't see the links.
Anyway, the process I see there, is the traditional kernel.org way, but plz don't make me read all the details in these pages, I could find them myself if I really wanted
All that I'm asking is an Arch-user to tell me from his experience if it is possible to install multiple ready kernels from the package manager and not by compiling them on his own.
*PLZ an appeal to all the users. Do not edit your posts after someone else has already replied. It leads to misunderstandings. If you edit it and in the proccess someone replies then delete your edit and make it a separate post. Thank you