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well i really just want the installer since i have a 4gb flash drive, but not an 8gb. mac was pre loaded with lion so i can't just go to the app store and re download it
 
well i really just want the installer since i have a 4gb flash drive, but not an 8gb. mac was pre loaded with lion so i can't just go to the app store and re download it
The Lion installer is slightly too big for a 4Gb flash drive. You will need to buy an 8Gb flash drive if you want a flash drive with the installer on it.
 
ok i have a 16gb flash drive. now how do i put just a lion image or an installer on it so that even on mountain lion, i can downgrade with just that flash drive? thanks
 
ok i have a 16gb flash drive. now how do i put just a lion image or an installer on it so that even on mountain lion, i can downgrade with just that flash drive? thanks

Your format the USB flash storage thumb drive properly*, then use CarbonCopyCloner (version 3.4.7 is still free) to clone the the disk image (Restore from disk image selected as Source) to the USB flash storage thumb drive (select that drive as Target).
 
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