Yep. I'm playing 2 pbem scenarios right now, one with the winter pack, the other with the set of mods I usually have. And, coincidentally, I play a couple of turns per day and game. So it's a pain to cut & paste the 7GB of the winter pack, cut & paste the 3GB of my usual mods, and a few hours later, cut & paste 10GB again, and cut & paste 3GB again (yes, ideally, and depending on your opponents, you could "only" cut & paste each folder once per day, but still). With a mod manager (which btw I've only used with Silent Hunter) you just click and it's done.