Hi everyone,
Is there a recommended, popular way to create png files for iPhone games?
I can get some background images and actor images from the internet, but not in png. what would you recommend?

Thanks.

PNG is a bitmap image file format. You can create them with (pretty much) any image editor. If you want to use an image that you only have in a non-PNG format, you can convert it using Preview.

To be honest, unless you've never encountered a PNG before, your question doesn't make much sense as it is. Could you elaborate a bit?

Any image program will create pngs. Just fire up Preview.app and File -> Save As…, choose png.

Just make sure you actually have the right to USE those images you're finding on the internet.