Well I tried.
I thought I had downloaded it. Well it appears in downloads. (Firefox) I ran the command in terminal and it says command not found

I tried thank you but it says command not found.
Hope I haven't bit off more than I can chew.
Maybe forget Win 7 reinstallation until I have more Linux experience.
Would Win 7 install via CD install on the old Win 7 section which is still there (Ubuntu can see the files) or would it overwrite Ubuntu?

When you download the bootinfoscript, it will be a tar.gz file: bootinfoscript-061.tar.gz. You need to extract it either by right clicking on this file and selecting one of the 'extract' options or by opening a terminal and going to wherever it downloaded, usually the user Downloads file. From there:

should extract it and you should have a directory named bootinfoscript. Change to that directory and run the command you did. Posting the command including the prompt would be helpful to point out possible problems.

Installing windows 7 you would probably need to use a custom install if that's available with 7 in order to select the partition you want.

I hope that I don't post this multiple times as I have tried several times to do it. I tried to do this suggestion of chance and it responds something like 'unknown command'.
Would a straightforward Win 7 CD install write to the existing Windows paetiton or would it overwrite Ubuntu?