Ok, after i type in the command 'sudo make-kpkg --initrd --append-to-version=-custom kernel_image kernel_headers", it does it's thing for a while and then i get an error:

Inconsistent kallsyms data
Try setting CONFIG_KALLSYMS_EXTRA_PASS
make[1]: *** [vmlinux] Error 1
make[1]: Leaving directory `/usr/src/linux-source-2.6.12'
make: *** [stamp-build] Error 2