Custom ROM on the TP

[caswenson69]

I am having a problem putting a custom ROM on my Pro. I have the phone unlocked and have verified this. First I tried to use active sync to put nueROM on the phone and it comes up with a Error 204 saying it can't read the file name. So then secondly I tried from the SD card, which is formatted to FAT32. When I load up bootloader is says its starting to load then just goes to the bootloader screen and sits there. I've changed the file name to what it saya to change it to (RAPHIMG.nbh). I just don't know what I'm doing wrong. Please help. Thanks in advance.