KSH- perform a function if user selects option from menu

Hi,

I have a script that copies a file from one directory to another and compiles it.
What I have now is a menu that calls functions and each function compiles the file.
I want to have a function that compiles the file at the end of the script if the user selects options 1-3 in the menu, but if the user selects the 4th option, the file will not be compiled.

Code:

#!/usr/bin/ksh



#-----------------------#
single_ntl()
#-----------------------#
(
#set -xv #debug mode	

	cp ~/fundtech/env/BM_UBB/GPPconfig_SINGLE.txt ~/fundtech/env/GPPconfig.ubb;
	cd ~/fundtech/env/;
	tmloadcf -y GPPconfig.ubb;
	
	

)

#-----------------------#
single_htl()
#-----------------------#
(
#set -xv #debug mode
	
	cp ~/fundtech/env/BM_UBB/GPPconfig_SINGLE_HTL.txt ~/fundtech/env/GPPconfig.ubb;
	cd ~/fundtech/env/;
	tmloadcf -y GPPconfig.ubb;

)
#-----------------------#
big_ntl()
#-----------------------#
(
#set -xv #debug mode

	cp ~/fundtech/env/BM_UBB/GPPconfig_BIG.txt ~/fundtech/env/GPPconfig.ubb;
	cd ~/fundtech/env/;
	tmloadcf -y GPPconfig.ubb;


)

#set -xv #debug mode
clear
echo "Please choose a GPPconfig file you want to use in this test:"
echo


PS3="Choose a number: "

select CHOICE in Single_NTL Single_HTL Big_NTL  Quit
do
  case $CHOICE in
     "Single_NTL") single_ntl;exit;;
     "Single_HTL") single_htl;exit;;
     "Big_NTL") big_ntl;exit;;
                Quit)  exit;;
                   *)  echo "\nInvalid Choice\n";;
  esac
done

Thanks,
Amit