Sync'ing Exotic Files for Palm PDAs

[eno]

I'm looking for a program that can sync files beyond what Palm Desktop 4.1.4 for Windows can sync - i.e. inside Palm Desktop going to Custom -> File Link... allows sync'ing of files with extensions of .csv and .aba as well as any internally known files such as data (archives) for Contacts, Calendar, Memos and Note Pad.

Aside of files, it would also be interesting to sync whole directories. E.g. I could have a directory called 'books to read' (maybe with subfolders for sorting). If I sync'd this directory, I would always have an up-to-date pile of to-be-read materials.