When I was playing around with them, I loaded them up in MS-Word, and then copied and pasted them into Paint Shop Pro (in my case, but Adobe Photoshop should be the same).
I would imagine, if you print them onto acetate, you could then stick the acetate onto some thin paper (thin enough for the light to shine through) before sticking it onto the dials. That way, the numbers and dashes on the dials would appear white during the day (not transparent), and would still light up at night...... although re-reading your message, this obviously wouldn't work if you wanted white dials.
Also, if you remove the needle, depending on how it works, you might find that you un-calibrate the speedo. When I repaired the speedo on my old mini (the odometer would stick whenever it reached a multiple of 10,000 miles!), I had to remove the needle, and because of the mechanical way it worked (may not be the same for the 480 - more electrical), I had follow another car and keep "tweeking" the position of the needle until I'd got it adjusted properly. - Just something to keep in mind...
If Murf's managed to scan in the infocenter screen, that'd be excellent. That's the only reason I haven't changed the dials in mine yet...