Installation:

1) Unpack the folders(maps and resource) to Steam/Steamapps/common/counter-strike global offensive/csgo
2) When prompted to overwrite, do that. You can also copy the files from the pack seperately to correct folders
3) Start your gungame server and change level by typing "changelevel ar_ravenholmsewers" into your console.

Pack includes:

- maps
-- ar_ravenholmsewers.bsp
-- ar_ravenholmsewers.kv
-- ar_ravenholmsewers.nav
-- ar_ravenholmsewers.txt

- resource
-- overviews
--- ar_ravenholmsewers.txt
--- ar_ravenholmsewers_radar.dds