I just wanted to post that I did my upgrade from zen 11.0 to sp1a . I am using oes2 sp3 and sles 10 sp4 fully patched. I am also using the embedded database provided by zenworks install. I followed the upgrade doc step by step and the upgrade went perfectly. It took about an hour to hour and half to complete. I see all the problem installs and I just wanted to post a success. I was initial worried about doing it but it was painless.