Trying to clean up /boot with no luck :-(

hello - not entirely sure that this belongs here - if not, sorry.

I am trying to clean up my /boot directory as it has run full

Found a suggested approach using

rpm -qa |grep ^kernel

followed by

rpm -e kernel-x.x.x-x.fc16.x86_64 kernel-devel-x.x.x-x.fc16.x86_64

using all but the most recent kernel found

luckily this system was not important - as I am unable to boot after doing so

Q1: What is the recommended / OpenSuSE-way to do this?
Q2: is there a way to recover the system after my attempt to do the house keeping? It's a virtual host (KVM)

thanks in advance
Jens