i used firmtool, not fwtb 4.5 to manually patch the key. this is what i did:
1. i kept orig.bin on my floppy, put firmtool on there, and also benq-iXa.bin *yes i used the fast one, but in my last post i said i used quiet*
2. in dosflash i erased the drive.
3. then i ran this command: "firmtool.exe orig.bin benq-iXa.bin"
4. went right back into dosflash. chose my benq vad6038, W for write, then enter. typed in "benq-iXa.bin"
5. tried it out, worked perfect, called it a night. if you use fast it is NOTICEABLY louder.