The kernel headers don't have any PAE, SMP, or any other extension. You simply have to check the correct version number. Open YAST --> Software Manager and look for linux-kernel-headers. Alternatively, from the command line do (as root)
Code:
zypper info linux-kernel-headers
and if you find what you're looking for just do
Code:
zypper install linux-kernel-headers
and the trick is done.