For the moment I have windows XP SP2, I want to install Ubuntu too and have the possibility to choose when I boot.
My HD is partitioned in 3 parts, C:/ Windows XP + programs, D:/ empty for the moment but I would install ubuntu +progs there, E:/ Documents
Is it possible to do this?
And how do I have to do this?
I have the CD.

Thanks in advance

Jonas It certainly is possible. The most current Ubuntu install walks you through it. Just tell it you want to install onto that second partition which is currently D:. You might want to split it into two partitions, one for the Linux swap partition. Loads of documentation on the Ubuntu wiki about that.

As to how best to partition? There are probably as many opinions on that as there are users...I was going to install it to my extrenal drive but then I got a MESSAGE saying it would format all my other drives in order to install it to the external drive???
Where is that good for?

Jonas If ubuntu doesn't let you install the way you want, try a different distroI have had SEVERAL different versions of Ubuntu installed on a hard drive where the first partition is WindowsXP Pro. This has worked out very well; I have never tried it on an external drive.
My hard drive is 120 gigs. First I divided it into two primary (ie. bootable ) partitions; the first was 100 gigs and contained WinXP, the second I formatted as ext3. Next I divided the 100 gig partition, making 30 gig for WinXP, and an extended partition 70 gigs, Fat32, which would be ACCESSIBLE by both operating systems.
Next, I divided the second partition, making a 2 gig swap partition, and leaving about 28 gig for Ubuntu. I PUT the install disk in the cd tray and rebooted and had no trouble installing. I have done this with Ubuntu Dapper, Ubuntu Feisty, and will
soon install the Gibbon (7.10) the same way. Really though, you should ask your questions on the Ubuntu forum and look around the documentation and wiki too.
They really give excellent advice there.