what can I carry, and what can I hold in my hand?

[akidd17]

I wanted to ask a couple questions because there has been some confusion when playing Zombies, and Bites.

The rules talk about carrying items (cards turned sideways in play). I understand things like "one-shots" and Items with values can be carried (meaning unequipped but in play), but what about race/mojo/power cards?

If you add a new mojo or race does the old mojo or race card get discarded? (I understand the double mojo and half-breed cards.)

Thanks in advance.