How to Flash Serial Graphic LCD

I bought a 128x64 spark fun serial lcd. I want to flash it with the firmware at SerialGLCD - Browse Files at SourceForge.net so I can use the library. I, however, have no idea on how to go about it. I need the basics. Do I need separate software to upload the hex file. Can I hook it up to my FTDI serial to usb converter to do this? Thanks for any help

Eric