I can switch between OSX, Windows and a network drive, but I cannot seem to find this option anywhere.
rEFIt is a boot menu and maintenance toolkit for EFI-based machines like the Intel Macs. You can use it to boot multiple operating systems easily, including triple-boot setups with Boot Camp. It also provides an easy way to enter and explore the EFI pre-boot environment.
- rEFIt allows you to sync partition tables
- set default to boot from
- define wait time before a boot option is selected
- configure the rEFIt boot screen
There's a System Preference pane called Startup Disk (Apple > System Preferences > Startup Disk) that allows you to choose which disk to start up from.
Does that help any?