Working with flac and playlists on D2

[OmegaChrono]

For some reason MediaMonkey doesn't want to sync my flac songs onto my D2. I can't seem to find what in the preferences I need to change. MP3s seems to work fine though, I guessing it's because MediaMonkey is reading it as incompatible with the D2.
At least that's what happend with winamp, and for some reason would always convert my songs to .m4a when transferring songs.
So basically, I need MediaMonkey to either sync my flac songs or for winamp to not convert my songs during the transfer. The latter seems easier, I can't find seem a solution for either.

I learned that I hate MTP mode, (but it seems like it's the only way to get playlists to work on the D2.)