Yes, you can.

2013 Rule Book, page 22:

Awesome. Thank you.

From page 22 of the 2013 Core Rulebook under STACKING AND UNSTACKING HORDE TOKENS.

ICwO went around Replace than Modify?

And no, that was not my only takeaway, just the only part I felt like following up on. ;-)

I'm pretty sure it doesn't.

Here what the rulebook says on the Golden Rules:

marvin k. seems to saying that ICWO supersedes Replace Than Modify. All Golden Rules can't be superseded. If a game effect does break one of the golden rule, which marvin k. seems to be claiming ICWO does, then the game effect is ignored.

Like you, I've never heard of ICWo going around Replace Than Modify nor can find anything in the player's guide or online that would make me think otherwise. I also haven't heard of any other player or judge who believes this.

Nope, I wasn't taking about you, but the other judge. I actually posted this before I knew you told him this.

EDIT: I didn't even know what ICwO was until I looked it up just now.

But for awhile ICWO had an official ruling that it eas the only exception to the golden rule. As I said this was a long time ago and may have been "lost" over the changeover. Unfortunately, I had to move from the my house I lived in for 20 years recently and one of the casualties was all the years of accumulated paperwork on rulings,etc... for HC so I can no longer post ancient rulings, but I'm talking way back on the rulings.

Since Golden Rules were introduced, there have been no exceptions to them.

Yes, there used to be a time where there was no Replace then Modify, but that worked with everything. When everything switched to Replace and Modify so di ICwO.