Testing leopard on external drive & Up2Date

I had a few questions with installing leopard;
i have a 300GB harddrive (IDE to USB2.0) with about 200GB of data on it and I wanted to partition it with about 40GB for Leopard testing, is that possible to do and will it run okay via USB2.0 or can it not run on usb drives?
secondly i recieved Leopard as an Up-To-Date offer and it just came with the disc so i was wondering since it just says Upgrade on the disc does it mean its not the "ultimate" version as the retail copy or what??
thank you!!

You can't partition a drive without erasing the data, so unless you have a place to backlpu your 200GBs, then you'll lose it all when partitioning.
*"disc does it mean its not the "ultimate" version as the retail copy or what??"*
No, it means that a previous version of OS X must be installed before Leopard will install.

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    Message was edited by: apple id number 11

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