What's the easiest way to get cgminer mining from a USB key (with 2x 4870x2s)?

[Amleth]

This is a headless rig made with an ancient (but dual PCI-e 16x with 3-slot spacing) motherboard/CPU/RAM combo picked up from local classifieds to put some of my old cards back into service. I imagine a linux distro of some flavour would be the way to go?

I found the BAMT thread but it apparently doesn't support 400-series cards? (And is no longer updated anyway) Are there other good solutions?