Can I do this with shipping in CS-Cart?

See my post on the Magento forum about my shipping config question:

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Turns out Magento could not do it.

In a nutshell, I want to be able to specify criteria for when a realtime shipping method is offered. I don’t want someone to be able to select a USPS method for the musical instrument and wish to define this either by weight or subtotal…

Can CS-Cart do it?