Ok, so this is kind of a long story so bare with me.
I Installed the jtag hack and an lpt port adaptor onto my xenon moterboard acording to this diagram:

I couldnt detect my box for a while through the LPT port and found that removing the 100 OHM resistors made it work like a charm. So I dumped my nand 2 times, but the tutorial I was following left out the fact that i needed to compare the two dumps. So my foolish self used the first of the two dumps to make my XBR.bin and flashed my nand. Then when i went to boot up the console I got the e74 error, so I compared the dumps and found that there was a 1 block difference. At this point my heart dropped because I thought forsure it was a bad flash and I had lost my original nand forever! However, I reflashed the nand with the first dump I had made and to my astonishment my 360 booted up to the original dash! Ok, so heres where the questions come in:
1. Since I flashed my nand back to the orignal with the first nand dump, dosn't that mean it was a proper dump?
2. If it is a proper dump and I'm in luck, what was the reason for the e74 error?
3. I've found a different diagram for wireing the jtag (see below) to the xenon board that requires x3 330ohm resistors and the jtag wireing is slightly different, Is it possible that I need to use this method instead? If so does that mean I only got e74 because the jtag hack wasnt in place when i tried to boot the nex xbr.bin? Is it a problem that I don't have 330ohm resistors on the jtag? (even though the diagram dosnt have them)

Ok, since I flashed the nand back to what I think (hope, pray, beg) is the original I've done another dump but this one was 13 blocks different then the first one. Im doing another dump as we speak, but I really need some help guys!