creating custom SLES11 ISO

Question

I am trying to create an SLES11 ISO with all the updated RPMs.

So, I tried

• 1)Copy the original SLES ISO
• 2)Replace the RPMS (to try out I just replaced just the curl RPM)
• 3)Recreate the ISO (mkisofs -r -R -J -T -v -no-emul-boot -boot-load-size 4 -boot-info-table -b boot/x86_64/loader/isolinux.bin -c boot/x86_64/loader/boot.cat -o ../sles.iso .)

When I tried installing using this ISO, the installation complained about the missing old curl RPM. I could not find which file had the information regarding the versions.

Does someone know how to create a custom SLES ISO?