I originally was copying files from our server to my RioCar like this :

Server 100BT -> 100BT Switch -> 100BT card in my PC -> back out same 100BT card -> same switch -> 10BT RioCar

I too was getting basically 100% CPU. So I copied a large number to a local drive and synce from there. Same deal 100% CPU. Didn't seem to be a huge (if any at all) speed increase).

Just did a 260Meg transfer from my local drive in about 600 seconds =~ 430kb/sec

Using Bulletproof FTP thru Hijack I was getting around 700kb/sec. Any suggestions to get the speed up?

Running Win98 + 2.0b7 + Hijack v180.

FWIW using the Hijack FTP client I get pretty much spot on 500kb/sec (as longer as the player isn't playing) through a 10BT crossover cable at home.