1. Go to versions folder Windows: %APPDATA%\.minecraft\versions Linux: /home/yourname/.minecraft/versions Mac: ~/Library/Application Support/Minecraft/versions 2. Find a folder with version you want to install Better Sprinting to (I’ll use 1.6.1 as an example in the tutorial) 3. Copy the folder and rename it to 1.6.1_sprint 4. Go inside the folder, and rename 1.6.1.jar and 1.6.1.json to 1.6.1_sprint.jar and1.6.1_sprint.json 5. Open 1.6.1_sprint.jar in an archiving software (I suggest WinRAR) 6. Download the mod and copy all files into the .jar file 7. Delete folder META-INF from the .jar file 8. Open 1.6.1_sprint.json in any text editor 9. Find “id”: “1.6.1″, and change it to “id”: “1.6.1_sprint” 10. Run the new launcher, press Edit profile, select release 1.6.1_sprint version and Save profile. Then you’re ready to go! I've added images for the newer stuff that's related to 1.6.1, if you knew how to install mods before 1.6.1 then you know how to install them now. Inbox me with any questions you have. DOWNLOAD http://bit.ly/161sprintDownload I have now posted a download link to my entire 1.6.1_sprint folder, if you past this in your versions folder and then select that version in your launcher, you should be good to goEnjoy.