http://www.dostips.com/forum/viewtopic.php?f=3&t=4741discovered this doesn't work in Win2000 and WinXP (seems to work OK in Win7) -- they lack the CHOICE command (or external program). Have not checked if adding an external CHOICE.EXE in 2000/XP will help or not.
UPDATE: It is possible to get it to run in XP by copying the CHOICE.COM program from Win98 ( it is found in the c:\windows\command folder )