No problem at all. You just have to have your MWO linked to STEAM so it shows up in your clients game bibliothek. I already got it because I reinstalled the game by STEAM a time ago (better download rate), but I think you can do that manually, too.
After installing the game by STEAM you are not forced to have the client constantly running in the background to play MWO; just look for the launcher in the directory where STEAM has installed the game and link it manually to your desktop. No STEAM client needed anymore, just for updates etc.
After buying the pack I just launched the game once via STEAM-client; after the usual MWO-login the game asked me to claim the "Light Mechs ... DLC", and that`s it. Quite simple.
To the people wondering which Mechs you get (at least in my case):
it`s the "xxx-(C)"-Version you can also buy ingame with MC or in the shop with cash (for me the Raven with dual-ERLL, and the AC-ERSML-Tcomp-boat). Only difference: it`s called "xxx-(S)" and the "+30% XP"-bonus was swaped for "+30% C-Bills".
I expect this to be the same with all the other packs, too, so you can measure their "value" by comparing to the MC/Shop-prices.
The "Phranken"-pattern is locked to both mechs, but you can use the colors (Phranken-black, - red and -yellow (aka "Bleached Bone" by tabletoppers )) freely.
Edited by MacMasters, 24 June 2017 - 08:46 AM.