PBlock96

From the main page of your modpack, click "Edit Modpack" on the right. On the page that comes up there is a button at the very bottom that says "Delete Modpack".

This needs to go in the Tekkit Lite section of the Tracker located here: http://forums.technicpack.net/tracker/project-5-tekkit-lite/

To do this you need to open up the modpack.jar and insert that param into the versions.json. In the version.json file close to the top there will be a line that looks like this:
 
"minecraftArguments": "--username ${auth_player_name} --session ${auth_session} --version ${version_name} --gameDir ${game_directory} --assetsDir ${game_assets} --tweakClass com.mumfrey.liteloader.launch.LiteLoaderTweaker --tweakClass cpw.mods.fml.common.launcher.FMLTweaker" Simply add that param  into that line. If you wanted to add any arguments to be passed to java, you would also want to include the second line with whatever arguments you wanted added. You would put the arguments you wanted passed to java on a separate line.
So, it would look something like this:
"minecraftArguments": "--username ${auth_player_name} --session ${auth_session} --version ${version_name} --gameDir ${game_directory} --assetsDir ${game_assets} -Dfml.ignoreInvalidMinecraftCertificates=true --tweakClass com.mumfrey.liteloader.launch.LiteLoaderTweaker --tweakClass cpw.mods.fml.common.launcher.FMLTweaker" "javaArguments": "<java args here>"