You shouldn't have to, and I think I remember doing what you need with EAC, but it's been years (like four or five) since I used that program. What I don't remember is how well it handles batch processing, if at all.

Personally, I've switched to an application called dBpoweramp. It does a fantastic job at ripping, but I also frequently use it as a batch converter, taking my FLAC tracks and turning them into more compressed files for taking with me on different devices. It's not free, but it's well worth the price.

Sorry I couldn't be more help...