[mods in a hosted server]

Step 1: Log into your server control panel.
Step 2: Gather the Workshop mod IDs of the mods you wish to install (The numbers shown at the end of the mod URL.)
Step 3: Open the SS Control Panel and your server
Step 4: Separated by commas (no spaces), enter the mod IDs into the Mod ID's. tab For example: 123456789,987654321,123456789
Step 5: Add the mods in the Launch Parameters Line .
Step 6: Most mods will go in the -mods parameter, some will need to go in the -servermods parameter.
Step 7: Enter the mod folder names separated by semi-colons (;). For example, if you wanted to load three mods with the names @MyMod1, @MyMod2, and @MyMod3, you'd set the text field to: "-mod=@MyMod1;@MyMod2;@MyMod3"
Setp 8: check "skip save config" (to avoid changing the config file to default) and restart your server

[NEW SERVER-How do i get the files on pc to edit?]

You edit them through FTP (WinSCP) you download/upload through FTP as well

[Dayz Custom Launch Parameters Breaking My Server]

isn't this a strange number of mods you wanna run, and expect them to run?... properly?   check if any incompatibility maybe

 

[Could I get a full list of commands I can put under the Launch Parameters Line]

Hello Mr. Rikorage, you can get the list of the parameters by bohemia interactive themself, here is the link to them https://community.bistudio.com/wiki/DayZ:Server_Configuration

Kind regards