OK, next question (and I'm sure I'll be kicking myself when I get an answer, because it can't be particularly complicated): how do I get the miner running on two GPUs? I'm working on a remote machine over SSH, and it sees two cards (and can select either one), but there doesn't seem to be an option to select 'both'.

[Edit] By the lack of response, I guess two separate instances is the only option, then?