Is it possible to use Hamachi to play with friends?
but to actually answer your question, yes it is technically possible
What would I need to edit to make it work?
I would recommend port-forwarding - Go to your router’s configuration and forward ports 80, 6112 and 9875, then (if using AS3) use cloudflare to point a domain towards your IP address or (if using AS2) ask your friends to connect using your IP and the ports listed previously.
Is it possible I can use hamachi or is it bad with hamachi (I mainly want to use hamachi because I don’t have the money for a VPS)
You don’t need a VPS when portforwarding. I would not recommend using Hamachi
Do I need to edit any of the files when port forwarding?
Just get a VPS… it’s not worth the stress and time to set up and manage services like these.