Sharepoint Service Pack 2 Release

Sharepoint 2007 Service Pack 2 Release(MOSS SP2)

I got a new task assigned to upgrade my MOSS Farm from SP1 to SP2.
Here are the steps which I done
Step 1
Installed Service Pack 2 for Windows SharePoint Services 3.0, x86 & x64
http://www.microsoft.com/downloads/details.aspx?FamilyId=79BADA82-C13F-44C1-BDC1-D0447337051B&displaylang=en

Step 2
Installed Service Pack 2 for Office SharePoint Server 2007, x86 & x64
http://www.microsoft.com/downloads/details.aspx?FamilyId=B7816D90
Once after the upgrade checkpoints -

Check 1
Go to the Control Panel>Add remove programs > Select "Microsoft Office Sharepoint Server 2007" > Click here for Support Information. This would be updated to 12.0.6425.1000

Check 2
Go to Central Admin > Operations > Servers In Farm > The Version would be upgrade to 12.0.0.6421 from 12.0.0.6219

Possible Errors
Strangely I was getting the below error while installing "Service Pack 2 for Office SharePoint Server 2007" Installer -

The error was saying something pertaining to Registry and Microsoft Search Front End which was a bit confusing, but later I found this was happening because of Disk Space on my C Drive.

Event Type: Error
Event Source: MsiInstaller
Event Category: None
Event ID: 1023
Date: 08/03/2010
Time: 18:27:26
User: *****\Administrator
Computer: ******
Description:
The description for Event ID ( 1023 ) in Source ( MsiInstaller ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: Microsoft Search Front End, 2007 Microsoft Office System Servers Service Pack 2 (SP2), 1603, C:\DOCUME~1\ADMINI~1.APP\LOCALS~1\Temp\coreserverwwsp2_MSPLOG.LOG, (NULL), , .

Creating a bit more space (1 GB) and rerunning the Installer fixed the issue, So a quick check would be on your C: drive space before you install the Service packs.

Known Error Lists Once after SP2 Release
http://www.wictorwilen.se/Post/SharePoint-Service-Pack-2-known-found-and-experienced-problems.aspx