Pep411...Format your sd card as instructed in the guide. After the format, Make a folder on your sd card named apps. Put MMM (Multi Mod Manager) in the apps folder on the sd card, make another folder on the sd card, name it wad....Put all the wads from the mod pack into the was folder you just created.
Go to the HBC and you should see MMM. Click it, click load, install all wads. Make sure they all install without error before you do anything else!!