A DOS window will open, with instructions and messages. After you're done, you must then run the Meade Autostar Updater program to transfer the software to the Autostar. The download takes about 35 minutes. A really, really plain vanilla application to patch Meade AutoStar ROM files as directed by a text script file. Kinda inefficient, but easy.
All values are hex.
Lines that don't start with one of the valid opcodes are ignored. Next, it goes through and runs all of the tests and applies all of the changes to the buffer. If any test fails, the whole thing just bails and the buffer is never written out. Read the instructions. All the software referenced in the HTML file are in the ZIP file as well.