HNNecromancy

Well.... you could buy a second minecraft Account which would be more worth it. You can use your bro's Acc which is Premium and download the files from the technic launcher for tekkit. Then just log in using a random acc which is not premium since you already have the files and it should work.

Well... You could play it cracked? The Tekkit server has to be set to offline mode. I tried it when my TechincLauncher was failing on me. Still was able to go on a cracked server. But I would recommend setting the server limit to 2 people since its only you two so that it would lessen the chance for a hacker to get in. You might need Hamachi since its you two as well. No point port forwarding and everything for a small server. Hope this helps [Edit] : I recommend getting minecraft cause if you crack, you can only play with your brother or in a private server. If I'm not wrong the default name for a cracked player is '' Player ''. So mostlikely there can only be one cracked player in a offline server. Idk, never really tested it out.