IN the Fossil.java: At the very beginning is a boolean DebugMode. Set to true for work in eclipse, false for compiles. The Fossillang and Dinosounds Folder must be in the jars/ressources folder for working in eclipse. place the whole fossil folder in mcp/src/minecraft. After recompiling/reobfuscating:(Debug MOde false!) Copy armor, fossillang,Textures and Dinosounds from the src folder in the reobf/minecraft/fossil folder. Copy the mcmod.info from src in the reobf/minecraft folder. Zip the fossil folder and the mcmod.info file up together and name the archive Fossil-Archeology.zip. That's it!