Normally, once your get the 11 part, you just "extract" all the parts.
It depend if the files where made by compressing a folder / file into part of a specific size. => normal step to enjoy the content is to extract to by using the 1st part.
Or if you took a big file and split it into smaller. => software will recreate the big initial zip file, which you'll then extract
What are you using, winrar or Zip (or another freeware ?) ?
Maybe get a new version if you haven't updated your archive software
Personally, I never had any problem extracting the multipart of screwthisnoise whatever the version or Illusion's game I downloaded from him.
Considering how much exchange there have been here, either there a communication problem between participants to solve the problem, or there one strange problem going on with your computer.
Have you consider downloading a single file using torrent instead ?