I'm guessing that the Mark1 player executable and the Mark2 player executable are different (duh), and since Frank's code-replacer only goes by file size, then that's the root of why you can't make it work on a Mark1.

An idea: Frank, if you based the replacement code on scanning for the sequence of image bytes within the player executable instead of placing the hack into specified offsets, then it would work for both Mk1 and Mk2 units, as well as future-proof the code for upcoming versions.

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Tony Fabris