Can Anyone Help William?

William sent us an email looking for some help. Anyone out there that can help him out?

From William:

I have a Gala CD700, and I need advice about installing the system disks.  When the batteries were changed, some functions (Golden gate “U’ and memory Tower levels 5,6,7, and 8) were lost.  Basic  1, 2 and GG1 and GG2 remain.  I have two system floppies (Golden Gate System 1 and System 2) but do not know the procedure for reconstituting the PROM in the organ to the original program.  Could someone tell me the proper sequence?