Thanks for your work Rolf, now FeynCalc seems to work fine with Mathematica 6.
So far I only found a tiny error which appears the first time I execute the "Calc" command:
Global`OverVector::shdw: "Symbol OverVector appears in multiple contexts Global`,System`; definitions in context Global` may shadow or be shadowed by other definitions."
Another issue is: How can I access the documentation from within Mathematica 6 (F1-help on function etc.)?
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