Did a bit of searching and found these two suggestions. The Bootcamp with Windows could be your best option, or possibly VMWare or Parallels with Windows. That’s better in a lot of ways because you can have OS X and whatever flavour of Windows open simultaneously and c’n’p between them.
Macintosh computers using Mac OS 9.2 or later will automatically detect flash memory players and recognize them as removable drives on your desktop and in the Finder window.
However, Creative MP3 players are not officially supported under the Macintosh platforms. The player will need to be formatted from time to time on a Windows PC, and any firmware updates will also have to be done on a Windows PC.
To ensure playability and data integrity, please consider the following steps in using these players in a Mac OS.
Eject the player prior to removing it from your PC. Though the device is hot pluggable, it is recommended that you use the eject feature for external drives to make sure that communications between your PC and the player has been stopped for safe removal.
Do not format the player using the Macintosh’s format feature, as the player has its own file format. The Macintosh formatter will imprint an incompatible file format onto the player thus rendering it unable to recognize the stored files.
The player supports standard MP3 and WMA file formats only, it does not recognize the Macintosh’s AAC (MPEG 4) file format.
Connect your player directly to your computer instead of through a peripheral USB port like those found on the keyboard of some Macintosh systems.
If you need to delete files from your player while it is connected to your computer, it is recommended that you empty your trash file after file deletion.
The Xtra uses the pre-MTP Creative-specific transfer protocol, so it’s different from the Zen Vision M and the Micro Photo. XNJB should work though.
Failing that, you can install Boot Camp on a FAT32 partition (i.e. <32gb) and use MediaSource to copy the files over, then boot into OS X and copy the files off the Windows partition.