Okay... so help me with a dummies version of this... so I can understand .

1. Open navboot in a Hex Editor, remove old gif and replace with new GIF89a file.

2. Remove the last 6 characters (00 xx xx xx) of the file and calculate the 24bit CRC checksum using Jacksum.

3. Convert the checksum into Hex (not sure how you did this) and add it as the last 6 characters of the file.

4. Save the new navboot and then overwrite the navboot in the iso with the new navboot.

5. Burn, install and enjoy?

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