pcefreak, what's that Valis III CD+G you have? Is that just that CD that came out to let you view all the cinemas in Valis?
CD+G was also part of the Turbo Grafx 16 propaganda back in the day.  Valis III CD+G has some arranged Valis sountrack that can only be found in this version mixed with Valis graphics.
Valis III CD+G 
Catalogue Number   TONS-1001 
Publisher   Toshiba-EMI
Composition   Minoru Yuasa, Michiko Naruke & Taakaharu Umezu 
First Printing   April 12, 1991
Price   ¥2800
01 Prelude of Valis  
02 Opening Theme  
03 1st Trap  
04 2nd Trap  
05 Valis Sword!  
06 Call to Three Warriors  
07 The Battle of Valis Part 1  
08 4th Trap  
09 Requiem  
10 Access  
11 The Battle of Valis Part 2  
12 The Battle of Valis Part 3  
13 The Battle of Valis Part 4  
14 Variations on the Theme of Valis  
15 Visions of Valis  IV
16 Ending Theme  
17 Theme of Valis for Orchestra  
It is quite rare as opposed to Valis Visual Collection. 

