You'll need an RS-232 to TTL adapter, like this one:

http://www.roboticsconnection.com/pc-56-6-serial-interface-connector.aspx

And these jumper wires are useful:

http://www.roboticsconnection.com/pc-31-4-12-jumper-wires-male-to-female.aspx

And you basically connect the eb505 to your pc, via the serial adapter/connector, and jumper wires, and send a command to change the baud rate.

The exact command is:

>set baud 38400<CR>

ACR<CR>

>

The command set for the eb100 should be the same as for the eb505, which can be found here:

http://www.a7eng.com/products/embeddedblue/downloads/A7-UM-ebSerial.pdf

As far as connections go, you'll need to connect RX and TX between the adapter and the eb505, then you'll need to provide +5V (REGULATED) to the eb505, as well as connect the ground between the adapter and the power supply for the eb505 (else serial communications won't work).

I will dig up the pinout, and post it this afternoon.

Best Regards!