But you would want to reuse those image lists on each level.

For example: For each level I have a list for 1. Player images, 2. Map images, 3. Enemies, 4. Objects.

If I have 100 levels I'd need to repeat 100 times - I'd rather just reuse the exisiting lists.

I must admit I havn't tried reusing image lists - I've just presumed they would work when I get to need them.