Install osx on external hdd (usb)

is it possible to install osx on an external usb disk?
And if so how do i do it?
Thx!

There are some utilities which claim to partition or re-partition on the fly.
DriveGenius seems to be the "Swiss Army Knife" of utilities, including the ability to repartition "on the fly" (A little scary for my tastes). But Prosoft is a trusted software manufacturer. There is also iPartition. and a couple of other utilities.
Myself would be a bit uncomfortable with this.
As for the size of the OS X partition, I would give it at least 10GB, if you can. The system itself will occupy 3-4GB and OS X needs room for VM to operate properly.
-mj
[email protected]

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