add a custom screen in minecraft launcher jar file

Feel free to copy the following folder structure to ensure your mods stay neat and sorted correctly by version numbers. This folder will serve, assuming you take advantage of it, as a repository for all the Minecraft mods and related materials you download. To that end, we’d encourage you to take advantage of the default mods folder within MultiMC, /mods/.

We like to keep everything (mods, resource packs, etc.) within the /MultiMC/ directory so we can backup and sync our entire Minecraft experience in one swoop. Before you run MultiMC for the first time, let’s do a little preliminary housekeeping to help us keep things tidy in the future. To get started, download the appropriate archive for your operating system and extract it. Remember our strong emphasis on the importance of backing up Minecraft? MultiMC is a perfect fit for a cloud drive or a location on your local machine that is otherwise automatically backed up as the /MultiMC/ directory is completely self-contained and houses all your Minecraft stuff. MultiMC is a portable application which means installation is as simple as extracting an archive of the current version for your operating system. Installing MultiMC and Practicing Good Mod Organization

Add a custom screen in minecraft launcher jar file