Not sure what additional information you're looking for...

I just use a task category called *Projects, so it is always at the top of my category-sorted list. I create and complete projects in the same way that I create and complete tasks (obviously).

You can create tasks quickly in Entourage using Launchbar and this script:

(*
Note: This was written and tested on Tiger with Entourage 2004, LaunchBar 4, and Quicksilver beta 42.
*)

on handle_string(theName)
my main(theName)
end handle_string
on main(theName)
tell application "System Events"
set frontApp to (name of (processes whose frontmost is true)) as text
end tell

tell application "Microsoft Entourage"
set catList to the name of every category
end tell
tell application frontApp
set selectedCategory to (choose from list catList with title "Select Category") as string
end tell
tell application "Microsoft Entourage"
set chosenCategory to category selectedCategory
set newNote to make new task with properties {name:theName, category:chosenCategory}
end tell
end main