How do I flash a modem for CyanogenMod / CM10.2?
I know this doesn't solve your problem of flashing a Modem via Odin, but have you had a look at the Collection of CWM modems, e.g. here
http://forum.xda-developers.com/showpost.php?p=47234771&amp;postcount=1220&amp;nocache=1&amp;z=1674485336989164

There is this hint:


  Originally Posted by lambstone
  Ok it worked.
  If anyone else is having issues with the baseband not changing, do this.


Use Odin v3.04
Untick Autoreboot
Flash modem
Reboot once again into Download Mode using (Vol Down plus Home button combi)
Flash Modem once more
Once done,unplug then reboot device manually.
If this doesn't work, try repeating the flash process again while rebooting manually and with auto-reboot option turned off.