You can make it do what you like.
During the Ubuntu installation process it is possible to key an expert or custom option and format the partitions of the new installation such that they fill the same space and place as any previous partitions, and selectively to format only those desired.
Ubuntu usually proposes to install with two partitions, a swap and /, with home included therein, but it can be set up with three. Your openSUSE 10.2 probably has three partitions, swap, /, and /home, and /home could be left unformatted, and thereby unchanged. It would become the partition /home under an Ubuntu three partition scheme.
You might download and burn a copy of Parted Magic or GPartedLiveCD to have a tool which will let you take a look at the partitions ahead of time, without the partitioner generating its own partitioning scheme. They have both GParted with a GUI and fdisk and cfdisk as needed.
As to the linking of the files in /home to the OS files in /under Ubuntu, I believe it is possible, but I will pass on how it is done, as it is Ubuntu terrain and I speak from openSUSE ground.
Others will step up, but you might search the forum for threads regarding /home. In the worst case you can always copy the contents of /home back and forth. Good Luck
Posting your e-mail as a login is not necessary or advisable. You will attract spam.
Last edited by thorkelljarl; 04-10-2009 at 06:29 PM.