How can i acces the panel after installation?
After the install was finished , there was a message "acces panel at http://192.168.100.x (the local ip ) , but i allready have something there. My question is , can i change the port of the panel?
You can change the port. I've done it and it works, but it can cause a few problems. If you want another port, you'll have to change it with MySQL (or reinstall the panel) and edit your nginx configuration to point the other port to the panel.
I can walk you through it, but I'm not good enough at it myself to just give a tutorial :p. If you can, it would be best to use another computer for the panel. You can always keep Scales and the servers on the computer your want.