This is just a modpack for 1.7.2 and above. It may work on 1.6.4, but (WARNING!) It is not my fault of what happens to you, your account, or your folders. Lastly, HAVE FUN! :) (THIS MODPACK IS A WORK IN PROGRESS, DO NOT USE)
Install RSUS Shaders Mod for 1.7.2+
Step 1
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Step 2
Type in the modpack name (RSUS Shaders Mod for 1.7.2+) or paste the following url into the search box.
Step 3
Finally, click Install at the bottom right of the launcher after you select RSUS Shaders Mod for 1.7.2+ from the list on the left. The launcher will handle everything else!