newbie: loading modified SFE bootloader

I own a Logomatic V2 card and wonder whether a modified SFE bootloader can be loaded by itself without using LPC Serial Port Boot Loader Interface. I’ve thought about the following:

Build USB_Bootloader_Source_Code with the name FW.SFE using lpc2138.cmd to overwrite existing SFE bootloader. Execute it.

Would this work? Has anybody tried it?

Thanks