Automatically marks targets in the Black Talon and lab BWL packs as well as in the MC lava packs and at Garr and Majordomo.
In order to use it, make a macro with the following content:
/run WeakAuras.ScanEvents("RAID_TARGET")
Once that's done, put the macro on a bar and bind it to a key or mouse button. Mouse over the targets in the packs mentioned while pressing the assigned key and they will get marked automatically.
It also works if you target them one by one but it's a lot faster and easier to just mouse over.