Hi Zac,
Exactly what Mark says! Find line 136(cwtagshipping.cfm), should be "<!--- Perform local shipping calculation --->
then on live 142 after <cfelse> ADD
<cfquery name="getWHolesaleCartCost" datasource="#request.dsn#" username="#request.dsnUsername#" password="#request.dsnPassword#">
SELECT SUM(tbl_skus.SKU_COST * tbl_cart.cart_sku_qty) AS cartCost
FROM tbl_skus INNER JOIN tbl_cart
ON (tbl_skus.SKU_ID = tbl_cart.cart_sku_ID)
WHERE cart_custcart_ID =#Client.CartID#
</cfquery>
<cfif getWHolesaleCartCost.cartCost GT 60>
<cfreturn 0 />
</cfif>
where 60 is your limit for free shipping. Just make sure its is set only for the Ground Shipping or so.
The above will display ZERO as Shipping cost in your cart.
Hope this helps.