Is it safe to manually update the IGB driver?

I've got two boxes in the wild with 20 NICs each. For some insane reason, the IGB module, which is capable of working with all 20 NICs, doesn't want to support the last 4 NICs. It's apparently an issue with the driver itself, and Intel suggests simply updating it.

So, if I do so, do I need to remove the Untangle provided IGB package first? Or should I just tell the customer to wait for an updated igb package from Untangle?