Disklavier

hello..i recently bought a disklavier..love it,it's a 1999 mkII 
xg...Bought music creator 2002,works ok,but i need to see if someone 
knows how to edit velocity,so i can make music a little softer. i 
can't seem to "save as" once I change the VEL...when I do,it's 
lost,and starts the same, won't save the changes..help???