P.S. I have done 3 full dumps of my 512MB through lpt and have been reading and reading while its been dumping to make sure I do everything correct. I had 3 error 250's when dumping, here is my log:
C:\nandpro20b>nandpro lpt: -r512 nand.bin
NandPro v2.0b by Tiros
Testing LPT device address:0378
512MB Nand Detected
Using LPT device at address:0378
Configured for Large Block Nand
Error: 250 reading block 1778
Error: 250 reading block 3E48
Error: 250 reading block 5828
When comparing these through Hex Workshop, they are pretty close but not identical. When comparing through Nand Compare v1.2 it says "1 non-matching block(s) found D44". I tried dumping D44 by using "nandpro lpt: -w512 d44.bin D44 1" and did that 3 times then compared them and they all matched, so I wrote them to the nand.bin and nand2.bin and compared again in Nand Compare, but it still said the same thing about D44.
I have dumped the first 70 MB through lpt and also dumped the first 70 MB from one of the full nand dumps and compared those which were identical so I am not sure what else I can do to get 2 identical full 512 MB dumps or if I am safe with what I have.