Ironically, I don't know anything about CLEO. I have it installed on my computer, but no idea what it does. I'm more of a reverse engineering type of guy. If someone wants to convert it to CLEO, that'd be great. I spent the last few days working on a rapid fire too. So I have all the weapons fully rapid. It's neat, I'll post a video soon and maybe someone can convert that one as well.
Ohh. I don't know much about coding, but CLEO's actually an extender allowing external SCM scripts to be run without affecting the main game logic. For example you can spawn a car using an external CLEO script instead of messing with main.scm and having to start the game from the top again.
As for reverse-engineering things, how skilled are you when it comes to that rather fine art? Do you do file formats as well?