[fw-mvc] Calling Models in Default Module

Hi,

How would I call models from the default module and how do I name the
model classes for the default module (I'm using ZF 1.8)? I understand
how to do this for non-default modules, but I can't figure it out for
default modules. I have the following directory structure:

application/
modules/
default/
models/
controllers/
views/
admin/
models/
controllers/
views/

Thanks,

Scott Sowers