|As best I know "all" email utilities (on-line - pop3 - email application, and MS Office\Outlook & Express) allow you to attach a file or folder.|
Which email application are you actually using?
When you create your Notepad document you simply save it, and remember where you put it. That is the location where you go to when attaching the file.
You may not have notepad installed, possibly you have wordpad instead? Both create text files (txt) so either would do.
To start either application, go to Start\run and then type notepad or wordpad and press enter.
If you don't have either installed they can be downloaded for free.