Thanks for the info. I just thought that in such a forum somebody would give me an answer.
You'd have better luck in the Color Management forum for this type of question. Anyhow... multiprofiler relies upon the monitor's factory calibration and characterization and does not require a puck. Luminance on this screen is entered directly in candellas per meter squared (cd/m^2).
As for the cable, I do DVI out to HDMI in all the time. In theory the formats are electrically compatible and use the same comms protocol so HDMI out to DVI in should work just fine (but I haven't tried that directly).
Your i1 Display 2 while not an ideal puck for the PA241w will still work. The NEC i1D2 pucks have a correction matrix in them. If you can't get the NEC puck, a Spyder 3 might be a better choice. If you know someone who owns an Eye One Pro and you're comfortable using a command line interface, you can actually create a correction matrix for your i1D2 based on measurements from the Eye One Pro (once you've created the ccmx file you no longer need the Eye One Pro) using Argyll CMS which is an open source color management project (if you're not comfortable with command lines though you might find it a bit complicated... there is a program called dispcal GUI which provides a GUI to one of the command line tools for building monitor profiles but it still requires a little bit of know how to get it up and running).
Cheers, Joe