Killing Fat Diet: Lunch Substitution?

I am using a hybrid program between the killing fat book diet and the new 30 10 30 NTF program. I really enjoy the killing fat diet due to it being incredibly easy for a busy routine. My question is if it is OK to use one of the lean cuisine frozen dinners for lunch as well in place of a sandwich? My assumption is as long as you stay within the caloric parameters all is well. I appreciate any feedback.

Yes you can do that.

Yes, the Lean Cuisine meals will work for lunch.

Awesome! Thank you guys for the feedback. Best programs that I have utilized thus far.