Roaming allowed for using local sims

Hello, I want to use the local sims having different MNC/MCC for implementing GPRS using osmocoms with OpenBTS same as I have used them for GSM calls and sms using only openBTS. But your site http://openbsc.osmocom.org/trac/wiki/OpenBSC_GPRS says, "it is currently not possible". As it is long when posted on this site so I want to ask is it possible *now* to use the local sims? Hope you have understood my question. Waiting for your reply. Thanks. Regards, Saba Arshad