According to the release notes, Nandpro does not natively support LPT adapter cards...
If I were you, I would build this USB flasher but involves some technical know-how & soldering:
http://www.xboxhacke...p?topic=12306.0parts are pretty cheap... you might even be able to request the PIC18F microcontroller as a sample from microchip.com and get it sent to you for free... but that could take a while. I'd go for a small proto-board rather than the breadboard since the connections will be much more reliable. Just check which color wires are soldered to which pins of the LPT cable, then get a cat5 cable (I'm guessing the port on your 360 is patch cable similar to
here) and match the color wires to the signals from the micro.
Other option is to wait for lflash.c to be updated with support to write Big NAND... I believe right now it will only read. I would still use lflash to read the original NAND if you don't already have a backup... it's much faster than USB/LPT.
*Edit*
If you are building the USB SPI Flasher, you will need a device to program the PIC microcontroller as well. I think the cheapest official programmer is the PICkit2 also available on microchip.com (Part Number : PG164120) or you can try to find instructions on how to build your own if you search google.