So,
You get a brand new shiny INTIP3, GD3 or GA3 card and it you hurry to a system to install some firmware on it and get it working.....
But when you fire up that wonderful bit of SW PC Installer and get all of the bits connected the upload fails at the end of the third file with a "Verifying Checksum ... Bad Data CRC" message
Don't despair, don't raise a e-SR (as you will spend three days trying to explain to the muppet at the other end of the internet that YOU ARE DOING THE INSTRUCTIONS FROM TC0521 AND THEY DON'T WORK (oops sorry for shouting)
What you do is the following.
Get the files off a working card and copy them onto the SD card of death from the board using a linux distro or ext2fsd (program that lets you read and write ext file system on windows) and stick it back in the board.
Boot the board and if necessary tell the board to boot from SD, allow it to boot up and then set PC Installer going with the correct options for your board as per TC0521
Reboot the board and get it to boot from Ethernet, this should now work ok.
Put shiny new board into the OxE and play away.
K.