In Express Scribe you can attach additional files to the dictation. These files are then sent with the recording when you forward or dispatch the file.
To attach a file, right click the dictation you are going to send, and select "attach file(s)". Then browse to the folder where the file is kept, select it, and click open.
Express Scribe will now automatically send this file as part of your dictation.
See also:
Using Express Scribe with your Word Processor