I am wondering how would I test channels for mode a/b/g/n for countries other than G

Problem-> I am wondering how would I test channels for mode a/b/g/n for countries other than GB.?

H/W -> WIFI sparklan WPEA110N
Chipset: Atheros AR9280
Interface: Mini PCI Express

Software ->
Linux fedora 11
Wifi Access Point utility -> hostapd

What I have done so far ->
1) I have changed the config file of hostapd_minimal.conf and changed the country code from GB to any other country for eg CN( CHINA) or US( USA).
2) I Have also tried to change the CRDA
ex-> iw reg set CN

Result of those changes ->
I have noticed that it successfully block channels that are not allowed in countries other than GB like for example in CHINA for mode a channels 36 is not allowed so result of hostapd turns false But it even doesnt allow the channels which are legally allowed in CHINA.

SUMMARY -> In short, if I change country from GB to any other country , the hostapd utility allows only common channels. for example 1) if I change country to US it will allow 36, 38 , 40 etc for mode a as these are the legal channels for both countries but doesnt allow channel 149 -165

Could some one please throw light on it.

Thanks and regards,
Sam