You have to use the PC Link software on your PC in order to install Free Launcher on your GP32.
Here is a step by step list of how to do it:
1) TURN ON YOUR PC
2) CONNECT YOUR GP32 TO YOUR PC
3) TURN ON YOUR GP32
4) ON YOUR GP32 SELECT THE PC LINK OPTION
5) ON YOUR PC, START THE PC LINK APPLICATION
6) ON YOUR PC, ON PC LINK, LOOK FOR THE INSTALL OPTION AND THEN DIRECT IT TO WHERE YOU HAVE THE FREE LAUNCHER FILE
thats it
this is of course assuming you already installed the USB drivers on your PC.