I've finally migrated my hard disks to the new PC, and the only strange thing that happened is that my hard disks and DVD R/W were named as hda to hdd in the old PC, but in the new one SuSE names them from hde to hdh, so I had to repair the existing installation with the installation DVD. All went OK.
I've checked the BIOS settings for something strange related with the hard disks, but found nothing.
Wen SuSE booted up, automatically detected and installed the new hardware.