I've seen the sheldonbrown.com page, and it doesn't answer my question.

Thanks for the bike.shimano.com link, though it doesn't seem to be accessable.

I have a 120mm steel frame, I'm comfortable cold-setting it. Even if I had to change the spacing to 132.5mm or whatever the OLD of the hub is, it's only 6.25mm on each side. I'd rather just play around with washers and locknuts if I could find a reliable method.