Ron,
You should be able to browse to a different folder to open the sequence. I have never done it, but I don't know why it wouldn't work.
Does the sequence work on your friends computer if you use your profile but not if you assign his profile to the sequence? If so, then we know there is a problem with his profile.
Also, does he have a picture set up in his adjustable preview? Is the adjustable preview checkbox checked in the plugin setup?
If he starts a new sequence, can he get anything on the screen?
Some things to check.
Wish I could be more help.
John