My friend iSmooch made a tutorial for installing forge and optifine with the new 1.6.2 launcher. I used to use Magic Launcher, but it was giving me more issues this time around so I thought I'd share this with everyone just incase it could help other people out in my situation as well. This technique helps you modify your jar properly so you don't need another type of launcher and works straight with the default one.
My friend iSmooch made a tutorial for installing forge and optifine with the new 1.6.2 launcher. I used to use Magic Launcher, but it was giving me more issues this time around so I thought I'd share this with everyone just incase it could help other people out in my situation as well. This technique helps you modify your jar properly so you don't need another type of launcher and works straight with the default one.