Any .exe for that
 

Has there been any type of .exe program that is used to automaticaly swap out servers files kind of like a WoW realmlist changer?

There's a launcher available at http://moestaverne.com/ It seems to be down more than up lately though based on the "omg halp me!!?!1" posts.

someone wrote a bat file for windows that handles it, at least I remember seeing a post about it.

Because someone like me who plays on multiple servers im constantly switching out my files and loosing other files and having to re download them

I myself use jsgme generic mod enabler. I play on multiple servers, as well as 2 local lan servers and this will swap out spells.txt, eqhost, ect ect...