It's pretty simple when you see it, you put the operating disk in the cd rom that you are installing then turn laptop off then back on and it'll ask if you want to boot from cd press any key which you do, it'll see that there is already am operating system on the hard drive and then ask you what you want to do.
1. Install on a partition other than the 1 the operating system is on
2 format the partition etc. (Xp)
I think w7 will install the operating system but save the first operating system in a folder called windows old.
Iirc

56 350 2.2 130ps mk7 with 2 side doors
65 290 2.2 125ps custom with 2 side doors
07 350 170ps
Ids v86 licence + v86.04 update + xprog
hereIds map
here