Managed Preferences or Parental Controls

I have a OSX 10.4.7-server and lots of OSX 10.4 clients. However, I want to setup 25 MacBooks for mobile users. On the MacBooks is 10.5. I want to setup the MacBooks with 3 users: root (for special occassions), admin (for installing needs) and a standard user. The standard user has to be controlled by managed prefs. I don't have 10.5 server. My own MacBook also runs 10.5 and I use WGM and so on to administer my 10.4.7-server. Here are my questions: - is it smart to download the admin tools for 10.5 and then use WGM to manage the prefs locally on the MacBooks ? Can I run more versions of WGM ? - is it better to use just the parental controls ? - is there another way to go deeper in the managed prefs of the MacBooks ? Any tips are welcome ! Kind regards, Y Bekkering, NL