TimeMachineScheduler disables Time Machine's automatic backup function and installs its own launch agent. The administrator password is required for all (writing operations) as the agent is located within the main library. Except disabling Time Machine no further system files and preferences will be touched by TimeMachineScheduler.
OS X 10.5 still has access privileges issues. This is even after the operating system has been updated, migrated, or installed with the archive & installer option. TimeMachineScheduler manages all files and sets the appropriate default values for owner, group, and privileges.
You can install and uninstall an agent, or just load and unload it temporarily to disable backups. You can set the interval between 1 and 12 hours. The agent can also be set to run at load, which is at startup and login. To run a backup immediately, you can press the button. The status of your scheduler will be displayed.