AHA, thanks for the info! I just found Thread
http://www.fileforums.com/showthread.php?t=65378 (sorry Lufcfan, you already mentioned the blue spots there) where Terry has the same problem. So do you think I could put the upgrade for my orange spot Infinity (do all versions before 1.36 have orange spots?) on a memcard on my old unmodded V3 using SM2.0 discs? Sorry to bring up this topic again, but I am offered a used Infinity and am not sure which version it is. Just want to make clear I can update it.