For a better transfer method have you considered making a Plipbox?
You can make them for a few quid off ebay.
http://lallafa.de/blog/amiga-projects/plipbox/
Just so you know on my A2000 I have to use the Amiga device from the v0.5 package, although the plipbox it's self can be flashed with the v0.6 firmware. I think there is something on the A2000 that conflicts with the fast burst protocol if I remember correctly. But on the A4000 I can use v0.6 on both the plibbox and Amiga side, you would have to see which works best on yours.