Your USB drive should be able to store and boot as many operating systems as its storage capacity allows.
Reformat USB Flash Drive To create the bootable installer, plug the USB drive into your current Mac. Click the Go menu and select Utilities. Open Disk Utility, select the USB drive, and click the ...
MacRumors is posting a story that Apple today released the Lion Recovery Disk Assistant. It allows you to create recovery USB sticks and HD recovery volumes on ...