Monitor USB hub - upgradeable to USB2.0?

Have recently acquired CTX UltraScreen 21" CRT monitor with built-in USB 4-port hub. No CTX driver provided (delault monitor), and CTX website does not list any 21" monitors for which drivers are available - is there any way of upgrading the hub to USB 2.0? I ask only because most motherboard USB's can be upgraded through software or firmware updating, and I'm running out of ports of my mobo, and don't want to have to buy a new hub if I have one already... Any thoughts gratefully received :)

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