Hello,

It seems you have done a good amount of research and this reply may miss the mark completely. Here are two articles that may repeat items you have already reviewed.
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But i only have an old G4 Machine with OSX 10.4.11 and this doesn't work.

This link indicates that the requirements are Mac 10.5 or 10.4: Use your AppleTalk printer with Snow Leopard - UPDATE.

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Others say, that one could use IP Printing, but I can't figure out if this is supported by the LWSelect 360 and how to find its IP-Adress.

How-To: Resurrect Your AppleTalk Printer in Snow Leopard

Back up everything you can't afford to lose: documents, mail, movies, music, photos, and other data and settings.