"Hi (so and so),
As stated in the licensing agreement (http://refx.com/products/vengeance/specs/ (http://refx.com/products/vengeance/specs/)):
"All melodies, melodic loops and compositions are licenced for non-commercial use only."
This means that you cannot use the melodies / melodic loops commercially. These cannot simply be used 'as-in' in your commercial productions.
You may use the drum loops and one-shot sounds provided in the samplepacks in your commercial productions. Additionally, you may break apart / rearrange / heavily modify the melodic loops, and then use these in your commercial productions. Once again, though, you may not use the melodic loops 'as-is' in your commercial productions.
Regards,
(leaving employees name blank)"
Now, I guess you just have to use discretion and hope they interpret "heavily modified" the same way that you would. Hope this helps!!