Unpacking .pkg

there is a good amount of settings I want to changed that have been packed. I don't want to rewrite it so I was wondering if there is a unpack utility around somewhere.

Nope, no one has written any form of decompiler for packages yet. The format isn't extremely hard to understand (a cursory look through a hex editor shows function names, library dependencies, a string table, and a wad of bytecode), but it's got a lot of stuff that'd require at least a fair amount of work to decipher. Also important, of course, is that the unpacking of those packages would probably count as reverse-engineering (violating the EULA), since that content isn't considered part of the mod packages, and would at the very least not decompile into an easily-manageable and -digestible format.

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Surgeon-General's Warning: Early test cases of Torn Stars have resulted in fatalities. The errors in the software should be gone by now. Hopefully.