Sorry I didn't get to the thread sooner to save you some work @Philsan - and also it's a wee bit frustrating that the files have mostly sat in the Atarimania MIA forum for most of 7 years now, and are still marked "MISSING" in the main database, or you might have found them more easily. AtariMania is my favourite website for browsing through such things, but how to be most helpful in filling in the gaps remains a mystery to me (as you'll see from all my forum messages...!)
Some of the other zips I'd posted there were about the 600xl games book by @Rybags that you're talking about in the other thread - I remember including original versions, but also updating a couple to use PEEK(106)-x instead of constant memory addresses, to stop the code getting corrupted when you run it. (That worked for my 800xl, but I later wondered if that might have broken it on a 600xl, ironically, given the title of the book!)
My method of testing the files was to type it up in a test editor, and then paste the text straight into Altirra (right click), having started it in Basic with no disk drive, but CharlieChaplin's methods sound much better.