It's really simple: you can't rename non-tool / weapon items. There's no way to rename emeralds, tnt, dirt, grass or any other item in-game. You could, however, edit the language files and manually change 'emerald' to 'ruppee' (and you totally spelled that wrong, makes my heart bleed deep inside).
Hmm, I don't think you would just rename the zip to jar. I'm pretty sure they use different encoding ( I am not sure.) I always use 7zip and drag the content of the zip to the jar.
Internet explorer saves the jar file with a .zip extention name. You just have to switch it back.
Great... another one of THOSE people... Mojang doesn't have to do what one person wants, they do what the majority of the community wants. And NOBODY wants a 3rd hat layer, or gold doors...
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Scary, yet cute...
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(Runs off to download the pre-release)
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DO SOME RESEARCH FIRST!!!
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