Hi, I'm new and are there any threads/posts that would help me decrypt a file? (npk)

[Renz]

Hi! I'm new here and found this site by chance and took great interest in it
Are there any posts or sites that would help me learn more about the process of decrypting a file, specifically a npk, cuz I don't know how to, and so I suck :')
I have the file I want to decrypt, the correct script and everything, I just don't know how to find what the script is asking me of (idk)
I've already read a few posts saying that I already have the correct script, but I don't know if I'm missing something since it's still not working (The output only tells me - c_structs: "xmath" "TMP" "x - 2")
I really want to learn the entire process myself but searching for what I specifically want to do doesn't seem to help that much due to a massive number of unique questions and answers and so I thought posting might help ^^;