I use 1.4 on my machine .. If you want to keep using the .exe launcher, I have not tried it, but if you install 1.4, you can just double-click on jemplode20.jar to run it. You can try just replacing the jre directory that gets installed into the program files\jemplode directory with a 1.4 JRE... I don't know how fussy InstallAnywhere will be about its VM... Give it a shot.

Mike