Upgrading to Leopard from external DVD drive

I have a 1.25 GHz eMac currently running OS X 10.4.11. I'd like to upgrade it to Leopard, but I don't have a working internal drive. Can I do that from an external DVD drive?

Yes you can, but it needs to be connected with FireWire. USB won't work because you will need to boot from the DVD, and eMacs cannot boot from USB devices.
If you have another Mac with a DVD drive handy, you might be able to use it as a FireWire DVD drive by putting in the DVD, and booting it up into FW target mode by holding down T at boot time. Then hook it up to your eMac with FireWire, and see if your eMac can see and boot from the DVD.

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    Hi Simon,
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