Bootable Snow Leopard external drive

Yes, just insert them into the Mac they came with and select the external HDD during the installation process.
But know, that the external HDD needs to be in the correct format:

How to format a new HDD/SSD to install Mac OS X or make a bootable copy onto​

Guide on how to use Disk Utility from the restore / installation DVD.​

 

Sure. Just use the same procedure with your iMac's restore disc as with a retail disc. Use Disk Utility or Carbon Copy Cloner to clone the restore disc on to the external media.

 

Not gonna happen. You need a retail disk to do that.

jW

 

Are you sure?
I could boot the Mac OS X 10.3 version made for my G4 iBook on a G5 Power Mac to take advantage of its power and may applications. All it needed was a Software Update.
But maybe Apple has changed that behaviour since all the crazy has spun into higher gear.

 

The functions inside the "Distribution" file, look like JavaScript functions. So, if you know a little bit about this script language, you can edit the "Distribution" file, so that the Installer "thinks", you can install the specific version of Snow Leopard on a certain machine.

The Leopard (also valid for Snow Leopard (tested)) thread here on MR contains useful info, but it is a "dirty" solution, because the recompression step in this thread includes all files in the desktop directory, which is probably not what you want. And btw, the xar installation is not necessary, if you have installed Apples Xcode developer tools. They already come with xar and other utilities.

Here is a "cleaner" method:
http://forums.macrumors.com/showthread.php?p=13000644#post13000644
(tested with my own Leopard and Snow Leopard disks)