Upgrading SQL2005 SP2 Eval To Full Version Issues

Hi,

I've got an issue - A client required SQL 2005 for a new CRM package. They run SBS 2003 standard R2, so I ordered the upgrade to premium. No worries, but the developer needed SQL before the package arrived, so we installed the eval version, and then applied SP2 because this was needed for the CRM package.

Now the full version has arrived. I tried running setup both with and without SKUUPGRADE=1 and neither way will let me upgrade, stating that a later version is already in use.

I do have a good backup of the databases (I also have an entire image-based backup as well) but I don't want a disaster. My question:
Do I uninstall SP2 then upgrade to the RTM version of SQL2005 workgroup edition (the one with SBS2003 premium) or is there some other trickery required?

I'd prefer to get a smooth upgrade rather than ending up in a situation where I'd have to restore a heap of things.

Cheers,

Jeroen