If you have updated the firmware in the Creative MuVo flash player to support FAT16 (and so allow easy reformatting under OS X) then you may have noticed that iTunes fails to detect the device. No matter how often I tried to add things like MuVo Helper or the ‘unreleased’ Nomad Plugin nothing happened.
What you need to do is throw caution to the wind, and HexEdit the iTunes.app/Contents/MacOS/iTunes file to change the capitalisation of the strings that iTunes uses to match the MuVo. Beware – this could easily kill iTunes, and has only been tested on a MuVo 64MB model (blue and white, no display – DAP-TD0001).
For iTunes 4.7.1, the strings appear around byte 0x45a9d0 – use the search function on MuVo (ignore the case for ease of typing). Be careful not to add any extra characters, but change the first string from Nomad MuVo to NOMAD MUVO and then change the next string from CREATIVE to Creative. I used HexEdit’s Auto file open mode to take care of resource fork information, and simply saved the file out again.