How to make release for *memstick.img

[Ian Smith]

Hi,

trying to figure out how 8.0-RELEASE-i386-memstick.img was made, with a 
view to, well, knowing how it's done, so perhaps I could do some more.

I've been studying release(7) and src/release/* for a while now, over a 
few releases.  I've learned a lot, and while there's plenty I've skimmed 
over the finer detail, I have some sort of grip on how floppy, cdrom and 
dvd ISOs are made, but can't see how the memstick images were generated.

Are there some pointers somewhere to the particular recipe used?

cheers, Ian