Ahh yess, You can do it, thanks to the modders for lg expo. But the fathom is already starved of ram, sense would take up all of it. Also some of the features don't work but if you really want to try it out here are instructions:
LG eXpo - [Update July 1st] How to install HTC Sense 2.5 (includes fix for native LG apps)
i recommend to do it after a hard reset, and back up all your stuff, just in case you want to revert back. I've tried this and well it runs fast sometimes just it runs out of ram some things don't work and can't really run that many other apps. I'm happy just customizing the titanium screen