Just finally tested this. So far, no errors! YEAH!
However, this should be added to the docs or something similar:
"When you switch versions of PHP you will get "Service Unavailable" upon viewing your site which may last up to a few minutes depending on the speed of the server as well as your broadband. Refresh your browser after a minute or two and your site should load again and be much faster!"
A few of us had tested switching PHP versions lately without the mod and got that. You'll also get it after you install the mod. Someone reminded us about the mod but the one on vbGamer's site. But his is only for 2.1. I'll let them know about this one for 2.0.x.
Not that I'm aware of... There are many, many sites that have games that can be used with the arcade and there would be no way to keep track of them all. You would just have to search until you find what works for you.
After you download it, there will be an /other folder within it. Move that folder to the /public_html folder or whatever subfolder you have installed your site to. Then install/update it or it will not work.