Yea I kinda guessed you can't open them and see what's inside like a rar but I just wanted to keep my hopes up encase someone knew how to
I'm sorry, but you still don't understand.
- You CAN open them and see what's inside like a RAR.
- Most of us know how to.
But, please understand that every single DAT file has a different format; each one of them it's a different type. There's no standard format that everyone uses for the DAT extension. ".DAT" is just a part of the filename. There could be anything inside.
So, what most of us do is:
1. Read all the "Getting Started" stuff on this site. (This is the most important step.)
2. Study the format of the specific DAT file that you're interested in, by opening the file yourself with a hex editor.
3. Use that hex editor or any other similar program (or, most likely, write your own program) to view/extract/insert/etc. data from/to it.
It is not that "we don't know" or "it can't be done". It's just that you have to do all the work yourself; there's no other way.