First, using the "DLC Editor" in "ME3 Explorer," find and open the DLC you want to enable for SP/MP/both. Then navigate the tree view till you find the file "Mount.dlc" (ie: "BIOGame/DLC/<DLC_Name>/CookedPCConsole/Mount.dlc"). Extract it, and using a hex editor, go to the offset 0x18h. These are the values that you will find at 0x18.
Byte Flags at 0x18
SP DLC's: 0x09
What I did was to set the MP DLC's to 0x1C to enable them in SP and MP. Doing it this way does not make a save game require the DLC (as far as I know), where as using 0x09 does. (I have not tested this yet, though, merely an educated guess).
Once you make the change to the "Mount.dlc," go back to "DLC Editor" and replace the "Mount.dlc" with the edited one. You do not need to edit the "PCConsoleTOC.bin" file, as you aren't changing the size of the "Mount.dlc" file.
Взято отсюда http://me3explorer.freeforums.org/enabling-dlc-s-in-sp-mp-t482.html
Пушки колекционеров прекрасно подгружаются в сингл, а вот с вулканом гетов беда - конфликтутет с цитаделью.