1.Search in google first strike dlc unlocker and download it,
2.run it,
3.when ur run it it will show u the link for the content that u need to download and paste into the cod bo folder,
4.if ur wanna play first strike maps run unlocker and either codbosp or codbomp.
How to run mp maps?
1.Enable vac in console(sv_vac 0),
2.run combat training or private match and type map (mp_kowloon,mp_berlinwall2,mp_discovery,mp_stadium) and play.
How to run Ascension?
1.Edit the config file in players folder,
2.add bind / map "zombie_cosmodrome"cosmodrome not cosmodrone cuz cosmodrone is dead ops, cosmodrome is ascension)
3.run unlocker,
4.run codbosp and select zombie mode,
5.press / and play.