Basically, I want the text strings to be different for a specific world of mine, so I want to edit the game text strings and save the changes as a package file so I can take it in and out of my game at will. I tried to download the s3se thing, but it's not opening on my computer. I searched online for tutorials, but I couldn't find any. If anyone has any advice, I'd greatly appreciate it!

If S3PE is not opening you are probably missing a libary it depends on. It should say in its instructions what you need for it to work.

I was actually referring to the s3 string editor! S3PE seems to work fine on my computer, it's the string editor that won't open! The problem is without that program, I'm not sure how I'm supposed to edit the text strings!