Ken,

Here is a link to a good thread lead by Melanie, long time PBP contributor, about this very subject.

Topic of the thread: "i just want to know how it is possible to scroll just 1 line of a 4x20 lcd using LCDout. example if i wanted to scroll just line 2"

Perhaps it will help you.

pblist.melabs.com/forum/messages/3064/3672.html

Good Luck