I tried to use this with my texturepack but it get this error,
java.util.zip.ZipException: duplicate entry: textures/blocks/grass_top.png at java.util.zip.ZipOutputStream.putNextEntry(Unknown Source) at net.minecraft.util.gui.UnstitcherGui.unstitch(UnstitcherGui.java:153) at net.minecraft.util.gui.UnstitcherGui.unstitch(UnstitcherGui.java:123) at net.minecraft.util.gui.UnstitcherGui.load(UnstitcherGui.java:60) at net.minecraft.util.gui.UnstitcherGui.main(UnstitcherGui.java:231)
java.util.zip.ZipException: duplicate entry: textures/blocks/grass_top.png
at java.util.zip.ZipOutputStream.putNextEntry(Unknown Source)
at net.minecraft.util.gui.UnstitcherGui.unstitch(UnstitcherGui.java:153)
at net.minecraft.util.gui.UnstitcherGui.unstitch(UnstitcherGui.java:123)
at net.minecraft.util.gui.UnstitcherGui.load(UnstitcherGui.java:60)
at net.minecraft.util.gui.UnstitcherGui.main(UnstitcherGui.java:231)