Xixiaolou i think it's not so easy as it seems. Because today packers using a lot of tricks like crypted/stolen OEP bytes, crypted sections, decrypting in memory on the fly, redirected/scrambled IAT and other shit, so i will be glad if there will working unpacker for one of these tricky packers. Coding universal one is almost impossible today. My opinion it was possible to code, when unpacking was about finding OEP (not obfuscated, crypted etc ..) and fixing IAT (not redirected/scrambled/destroyed), but not today.