I tried searching - sorry if this is a duplicate post...

I have the free shipping module set up for one category of items (necklaces). I also have the table rate module set up where orders under $49.99 cost $7 for shipping and orders above $50 ship for $0.
I have ten other categories of products that do not ship for free. However, if a customer adds a necklace (free shipping) and several other items to the cart totaling above $50, the $0 shipping does not become available until the subtotal excluding the necklace is above $50.

Is there a way to combine the shipping modules so that all orders valuing $50+ ship for free even if the cart includes a necklace?

Thanks!

P.S.
I'm on Zen Cart 1.3.8
Patch: 1::
Database Patch Level: 1.3.8
PHP Version 5.2.14
and I'm little scared to upgrade as I added a community module for wish list registry and a community module for stocking by attribute that were written for 1.3.8 - I don't want to lose my add-ons!