I have followed your tutorial here: http://www.inmotionhosting.com/support/website/dreamweaver/dreamweaver-cs5-how-to-configure-server-settings
for setting up DW but can't establish a connection. I wonder if a support agent can share my screen with me to help me set this up? I've also tried creating another FTP account in cPanel but that doesn't seem to work either.
I found the Admin details in my AMP and learned that the FTP username isn't the same as my inmotion user name - it's the username within the Admin details of the AMP
Glad you found those details. As you mentioned your <a href="http://www.inmotionhosting.com/support/website/ftp/getting-started-guide" target="_blank">FTP settings</a> for the FTP username should be the same as your cPanel login, instead of your AMP login which would be an email address.
If you're still having any problems at all please let us know.