So the NULL trick is dead, and it seems that on W7 ACPU doesn't work as expected. No one else that had the same experience with ACPU on W7?
ACPU works fine on Mac but can scale images so you just have to be careful. I think that might be the issue you report on Windows. And on the Mac, under Lion, the ColorSync utility can print a target untagged (with it’s own scaling oddities).
Lastly, you could just download the demo of say i1Profiler and print the targets there. IOW, you don’t need a dongle or serial number to load and print a target. Kind of overkill in terms of a download to print a target but it will work.
In CS6, even if you could see the profile, it is smart enough to pop an error if the document color space and the print color space are the same.