Agregator protocol

Hi, I'm trying to use aggregator protocol (patch from Alexander Chernikov). Can someone explain if I can use this patch to aggregate routes to upstream providers ? My goal is to not use "route x.x.x.x/xy reject;" syntax to announce routes to the internet, but rather use aggregation, which will be used only if there will be one or more more-specific-route within particular prefix from iBGP session. -- Regards, Luk