How to add the WSS application templates to SPS?

First, go to this site and download the WSS application templates:

http://www.microsoft.com/technet/prodtechnol/sppt/wssapps/default.mspx

Next, uncompress the downloads to a fileshare and then add them to the portal's site gallery using the stsadm.exe tool.

stsadm -o addtemplate -filename c:\fileLocation\template.stp -title TitleOfTemplate -description DescriptionOfTemplate

After you add the application templates, run iisreset and give it a try.