RMS Winlink Software (RMS Express) can be downloaded by clicking here
Clicking here will take you to the main Winlink website
This RMS Winlink Presentation has been used for Winlink training
I really like sites that provide a menu of items collected all in one place. This Link will take you to the Travis County ARES site and lists a number of general ARES instruction videos, including RMS Winlink.
This Link will take you some more RMS training videos.