> The issue is that my g3 300 machine is pushed to its limits. it has 384 of > ram and 10.4.3.
Yep, that machine is definitely under powered for Tiger. Deleting user accounts won't help with the speed. You will want to disable fast user switching though. System Preferences > Accounts (tab) > Login Options (button) > Enable fast user switching (make sure checkbox is not checked).
