regions are only related to frequency restrictions and default preemphasis settings, things that caused "fm transmitter disabled" is quite simple - i was using fmtxd binary patched by fmtx-faker as base ( fmtx-faker changes dbus service names in fmtxd binary to operate ) there is updated version of fmtxd at my site that doesn't require fmtx-faker on phones with transmitter normally enabled, fmtx-faker is still required for phones with transmitter disabled
New updated FMTXD for 1.3 is here http://jacekowski.org/Maemo/FMTXD1.3