Good luck Delpheno
My 5670 came with two partitions on the HD (both were FAT and I ran CONVERT to make them NTFS) and XP Home on one. I used qtparted to setup the last partition as swap and / (be careful not to touch the "extra" leading partition - it is for restore. When I was done putting Kubuntu on as my second OS, grub added the XP Home to the boot menu - suse 10 should do the same for you as well.
Back on topic: I installed the linux-686-smp (just a metapackage for the i686 kernel in k/ubuntu) and a cat of /proc/cpuinfo shows that I am using both cores now.