I'm the developer of Preware.
You should just point people to http://install.preware.org/
for instructions and http://get.preware.org/
for the packages if they can't use WebOS Quick Install for some reason.
You should remove that specific direct link from your post, (a) it's incorrect (you're missing a 'k' from the end) and (b) it will quickly become outdated and (c) when you use WebOS Quick Install to install Preware it automatically gets the latest version for you by default.
The best way to learn how to install Preware is to download the Preware Homebrew Documentation app from the official app catalog (yes, that's correct - HP/Palm allows homebrew instructions in the official app catalog).