Stuff to note:
It has a US BMX BB shell. DMR do adapters so you can fit a square taper or outboard BB.
Basically, there are few cassette hubs in the spacing you need. And screw-on hubs don't give much option to tweak rear chainline. So you need to do your homework.
Rear ends on non-disk Humus were 110mm, 112mm, and 120mm. All are variations on old-school track or BMX spacing. My A'ha is 112mm with a perfect "track standard" 42mm chainline. This limits your rear hub choices to BMX, track or older dirt jump bikes (DJ bikes now all seem to use 135mm disk hubs). So the options are somewhat limited unless you go upmarket to Phil Wood, Campagnolo Pista, Profile BMX (drool) etc. Or put a screw-on freewheel on a narrow old road hub. Maybe Surly or On-One do one? Alternatively, go to Alans BMX: He has some old-school BMX hubs that will do the job and look the business.
The curved top tube is a lot thicker walled than the Humu. Combined with the gas-pipe rear end and the big BB shell, it's no lightweight.
Yes, stars and bars are presumably decals, but are under the clear coat.
Kanerdog has the most awesome A'ha ever:viewtopic.php?f=6&t=18821