Justin,
I figured I would start with attempting to read some data first, before I go attempting to write things. Following the guide above, I've got it into bootloader mode, and have the following being sent:
0x55, 0x55, 0x05, 0x04, 0x01, 0x02, 0x00, 0x00, 0x04
(my assumption would be read 1...