The BFG2 Mod Manager has been released, Download it Here:
https://www.moddb.com/mods/battlefleet-gothic-2-mod-manager

It comes pre-loaded with 7 mods, and allows you to swap mods in/out at the press of a button.
Be sure to check the extra installation step if you've never installed mods before^
You will also find a Modding Toolkit on the Mod DB page, which features automated Scripts for your ease of use.