Upgrading SAP WAS 6.20 from SAPDB 7.3 to 7.4

Hi

I am trying to search for some guidelines on upgrading my SAP DB to 7.4 as mentioned in Craig's excellent weblog on patching the system.

I have gleaned so far that I must install the 7.4 version, then uninstall the 7.3 version via the SDBUNINST tool.

Would someone be able to flesh out the actual steps I have to take. Since I have spent the last couple of days applying the patches up to SP37 I don't want it to all go wrong now!

Thanks in advance.

Ian