Similar questions have been asked before. Besides following your country laws pertaining to frequencies you can use, you will need another Vera that will have the different z-wave chip for that frequency. You can not run two z-wave devices at the same time on one vera.
in general, i do not really mind about having another Vera,
the legal’s about the frequencies are not really a issue, since i do live in THailand
but i did read ALOT in the forums here about the trouble comes with bridging veras,
like device status not synced and so on, or was that just user errors ?