What BrowserUK was trying to show you is how to get modules from _other_ PPM repositories. If ActiveState's repository doesn't have a particular module, another repository might. He was trying to get you to add Randy Kobes' repository to the list that the ppm utility uses to find modules.

Start up ppm or ppm3, then type in this command:

  rep add RandyKobes http://theoryx5.uwinnipeg.ca/ppms/
[download]

(I like to use the person's name as the name of the repository, to remember who to thank!)

Then do a "search template-toolkit". Now you will see a listing for a 5.8 compatible module. You can then do an "install template-toolkit" to get the right thing. If you have confused ppm enough, you might have to say "install template-toolkit -force"

But this is assuming you are using ActiveState's ActivePerl 5.8 distributions on a Windows box. perrin correctly wonders if this is true - is it? If so, maybe these other notes will help you:
Re: Installing Modules in Windows
Re: Installing Modules in Windows
Problem installing PPM
Installing modules under win9x
Win32 5.8 repository (from Randy announcing his repository)
Modules in the Windows environment