Adding the Knowledge Base site template for MOSS 2007

stsadm -o addsolution -filename C:\Bits\KnowledgeBase.wsp

stsadm -o deploysolution -name KnowledgeBase.wsp -allowgacdeployment -immediate

WSS Central Administration site.
Click the Operations tab, and
then click Solution management under global configuration.

After all the solutions are marked Globally Deployed,

run iisreset from the command line.
http://technet.microsoft.com/en-us/windowsserver/sharepoint/bb407286.aspx