How to easily enable "Lua" in Vim 7.4 (would possibly like to avoid building it from source if possible)

My Vim 7.4 "Lua" is disabled. I need to enable "Lua" in Vim so that I can setup "neocomplete". Is there a way to enable "Lua" without removing/reinstalling my current Vim installation. If I happen to built source from scratch I'm aware about "http://vim.wikia.com/wiki/Building_Vim", however any further detail hints/specification are greatly appreciated (I'm still a beginner). Thanks in advance

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