Hello Silvia,
the others have given you much INformation already, but i have the bad
habbit to „always add something“ 
As my school has not a pc to install xenserver on it, I am trying to
install linuxmuster on an existing WMware using manual installation.
thats not necessary. I importet the gibe ova Files in Virtualbox.
ova ist a Containerformat for „virtual Appliances“: VMWare schould also
be able to import these.
The only thing you will have to rectify afterwars is the Netzwork Stuff.
When (and if) I succeed, I’ll need advice to prepare the student client
that are old 2006 netbooks with XP on it. Luckily, they have 2 partition.
… netbooks… not good.
Old Hardware is normaly no Problem, but Netbooks are very slow:
Processor, Grafics and Storage. These Things do not give you a lot of
fun while using them.
Next Problem is, that they tend to habe very flawed BIOS/UEFI and there
are not updates to fix these Flaws. Thats something that has always been
a Problem with Linux: workaround for faulty BIOS.
- Is it possible for me to leave the first (the one with xp on it)
unchanged, and install linux on the second?
… you will have to decrease the Size of the first Partition to make
room for linux and linbo.
Will Linbo start from
the first partition without managing it?
no. linbo resides in its own Partition (or on an USB stick) called „cache“.
And can linux start on the
second partition just changing the partition itself, without
touching mbr?
why do you not want to modify the mbr?
Fear of a not booting Windows installation?
no Problem: it ist possible to make it boot again: up to now we have
managed atleast that every time 
- Do you think the standard linux image will start on such a poor
device, just for the time to install lubuntu-desktop? I’d prefer to
install peppermint on a test pc and then export that image. Is it
possible?
yes: most easy it would work, if linbo was installed on the Computer
before you installed peppermint.
And it should be installed in sda2 wiht a (no matter what size) sda1
with NTFS, to reflect the Windows Partition.
What personalization (to fit linuxmuster) should I do?
i would rather advise you to use one of the predesigned default Clients
provided by the linuxmuster community: the are ease to setup and
everything works out of the box.
There are cloops for:
12.04 32bit
14.04 64bit
16.04 64bit
i would advice you to try 12.04, since it would run better than teh
other two on yout netbook.
I know these questions are complex but I just need some advice and,
if possible, some hint on the documentation, as it is difficult to
browse it in a language you don’t speak. (When you land, google
translate help!) Thank you very much. Silvia
we are specialists in „komplex Questions“ 
Two Years ago our Dokumentation was translated to english: but well …
that was two years ago.
Good thing is: linbo is still working the same way.
Best thing for you migt bee, to just ask her: the Commmunity will point
you in the right direktion or provide an explaination.
Yours
Holger