After reading this I went back and looked at doing that in a new folder and discovered my part 4 and part 7 lacked the underscore between file name parts. It had this:
ScrewThisNoiseHoneySelect2DXBetterRepackR4.0.1.part07
instead of looking like this:
ScrewThisNoiseHoneySelect_2_DX_BetterRepack_R4.0.1.part07
I'm not sure why, but when I down loaded thats how they read. As a result I was getting file not found errors out of 7zip. Which explains why I was getting errors.
I went back after reading alex2011's comment and looked at the OP links and they all seem to look the way they should. If you get errors in the extraction, look for that first.
ScrewThisNoiseHoneySelect2DXBetterRepackR4.0.1.part07
instead of looking like this:
ScrewThisNoiseHoneySelect_2_DX_BetterRepack_R4.0.1.part07
I'm not sure why, but when I down loaded thats how they read. As a result I was getting file not found errors out of 7zip. Which explains why I was getting errors.
I went back after reading alex2011's comment and looked at the OP links and they all seem to look the way they should. If you get errors in the extraction, look for that first.