There's 2 fast ways to test HER with MOHA without the need to download all the patches before, here the ones:
1. You Have the Demo version of MOHA (or want to download it before the full game)
Download Download HER 1.1 and install at your demo (follow the instructions)
2. You have the FULL game, but just don't want to download the large patches to play SP or test HER.
Download Download HER 2.0 and install at your full version of MOHA (follow the instructions)
Enjoy what is a lot close of what was jump upside the enemy during WWII and good lucky! you will need it! :P
More info at Her.hajas.org