Mod a Mod

Hello everyone,
I would like to change the blueprints of another mod. But I don't want to change that mod. I would like to have the original mod and my mod which mods the units of that mod. How can I do that?
Thanks in advance.|||Do a bp merge for those units here's a guide for SC2 but for FA they work in the same way there other guides laying around.
http://forums.gaspowered.com/viewtopic.php?f=19&t=50438|||It's exactly the same as a regular blueprint merge in a normal mod. You just specify the other mod's unit BlueprintIds instead, and make sure your mod_info.lua has the other mod's UID in the 'required' table.
Hooking other mods scripts is a bit more complicated, but can still be done.