Ok, thx for the start on the 634 model Daks.  Here is the full code in case H8ter gets stuck.  I was working on this but the original question pre empted it.
Ok pop pickers, here is the 634 model with scrolling text, anyone feeling like a guinnea pig?  Currently, 1st line static, 2nd line scrolls, 3rd n 4th static.  Unless you exceed 20 characters on any line, in which case it may scroll too.  Don`t know what happens if you try n scroll more than one line at a time (edit instances of options to 7 under R00, R01, R02, R03 to play with this.  Enter a space in the required text entry box to make that line blank.  That should about cover it.  Remove the screen and re-add to change the text to something else.  Static and permanant text screens (manually entered as per my 631 model) to follow, when this is tested.
I haven`t tested this.  I haven`t even seen it as I don`t have a 634 to test on, its written `blind`.  If anyone can give me a full report then this would help before releasing it and other derivatives as per the 631 model.
EDIT: Due to an extra zero problem diagnosed by JC I`ve now attached a new file @ midnight on 20.12.04  Thanks again Jim
Steve