The workaround won't meet my needs for directory structure. I move files around enough that it'll become a greater headache than just letting MC sync files with the standard [artist]\[album] structure. Until the temp location bug is fixed, I'll settle with what's simplest.
Thank you all for the library field expression, that was immensely helpful.
This handheld sync itself is a workaround for another problem I was having regarding Library Sync and/or handheld sync across a network onto a removable drive (SD card). I posted a topic about it, but no one's answered (
http://yabb.jriver.com/interact/index.php?topic=61740.0).
Basically, I am having trouble syncing my main library to my server client with transcoded (portable) mp3s. When I start the manual sync, it copies the files 1:1 with no transcode.
If I try handheld sync across my network to the SD card, the sync resets on each sync, and creates duplicate files rather than overwriting. I digress, but if anyone has answers to that... you'd really save my day.