Some quick docs:
I assume a TFTP server waiting at port 69 on your PC. First configure the C64's mac address and ip address. The mac adr is specified by a string with exactly 6 chars, like "pooper", "macadr" or "k2D'%#". I'll use "dreams" for philosophic reasons. :)
To configure your C64 with the mac adr "dreams" and the ip 192.168.0.2 type:
to load the file "hero" from the tftp server 192.168.0.1 . The server must be in the same subnet as your C64. Lazy me did not take care of routers yet (but Switches work).
Note that this prg is bloated, slow and not very useful - in other words: my first try with the card (just leave out the stupid flasher ;).
Http load is a rom image for your Retro Replay. Use it to download games, demos, mags and interesting adult pictures from the web directly to your C64. Please note: it does not work on Vice/WinPCap right now, use a real machine! }:~>
You will need DreamAss to build the rom. Get it here. UnBZip the archive, run 'make' and you will get the file 'http64.bin'. This is the rom image for your RR. Use the flasher shipped with the cart to transfer it.
Some short docs: