ok, here it is:
1. Backup you server files. If something will go wrong, restore this files
2. We need working updated steam server with metamod.
For example, server located at /usr/steam_old/hlds_l, and we need to install dproto for Counter-Strike (cstrike), so metamod must be installed at /usr/steam_old/hlds_l/cstrike/addons/metamod
3. Ensure that our server is up-to-date
4. Download and unrar to temporary dir that archive.
http://www.sendspace.com/file/kw4bk8There are 2 files in archive: dproto_4383_a19_i686.so and dproto.cfg
5. Make cstrike/addons/dproto directory on you server and copy dproto_4383_a19_i686.so to that dir.
6. Copy dproto.cfg to server root (/usr/steam_old/hlds_l) or to gamedir (/usr/steam_old/hlds_l/cstrike). Note that dproto will search config in server root first
7. Add following line to cstrike/addons/metamod/plugins.ini file
linux addons/dproto/proto_4383_a19_i686.so