So, i have updated to 1.3.1, yes I can get on EMC without constantly changing .jar's, here's how:1. go to this link and download the tekkit launcher. http://www.technicpack.net/tekkit/2. Install the tekkit modpack launcher.3. once complete enter your IGN and password (yes it is safe, and approved by mojang)4. select "vinalla" modpack5. go to "options" select "custom build select", and choose 1.2.5 build6.click "login" in the launcher and when it ask's you to update choose "no"7. wait for about 16 seconds and it will bring you to a new minecraft title screenand now you are done, tekkit adds mods every update, customize what modpack you want, that's basically all!