None of these are required to play on a server, and installing these will not affect whether or not you will be able to play on a server.

Name: M1840 NCO Sword Fix
Submitted by: Azrooh
Type: Optional Fix - Client Only
Description: Fixes the positioning of the NCO sword.
Installation Instructions: Extract into your Secession folder, make sure to merge folders and overwrite.
Secession Version: 0.21
Additional Notes: None
Download Link: http://www.mediafire.com/?lja35n0azdaml8r

Name: Round End Music Fix
Submitted by: Tessius
Type: Optional Fix - Client Only
Description: - Shorten the round end music from 30 seconds to 18 seconds.
Installation Instructions: Extract into your Secession folder, make sure to merge folders and overwrite.
Secession Version: 0.21
Additional Notes: A quick guide on how to get your own music in as round end sounds (or remove them entirely):
1: Choose your song
2: Convert it to .wav with Audacity
3: Rename it to unionvictory or confederatevictory, depending on what you want to replace
4: You're done! Start up the game and enjoy.
Download Link: http://www.mediafire.com/?3l68fvi92ckb66b

Name: Updated Map Pack
Submitted by: Kegger
Type: Optional Update - Optional for client, recommended for servers (unupdated clients can play on updated servers)
Description: Fixes some bugs in multiplayer maps & improves many of the maps themselves.
Installation Instructions: Drop the files into the Sceneobj folder which you can find in your Secession folder.
Secession Version: 0.21
Additional Notes: Mapping Changelog
Battle of Fredricksburg: Some fencing removed, small farm added, 2 fields added, Team 2 spawn moved, camp placed by new spawn
First Battle of Bull Run: Some texture editing, some terrain editing
Pennsylvania Farmland: Fixed some floating rocks, removed dummy causing "0 damage" text glitch
River Shootout: Wall at Team2 spawn fixed
Death at the Road: Removed dummies causing "0 damage" text glitch.
Download Link: http://www.mediafire.com/?w733523hgu77a9b