Usrp_inband_usb and usrp_std

Hey all
currently i’m modifying usrp_std.v to be able to include FFT
the fpga so i could perform spectrum analysis and total size after
fft is 76% which is good, but recently i knew that the application which
want to run ( Openbts ) require the usrp_inband_usb project not the
… so now we’re really confused
Please i want to know what’s the difference between these two projects .

another question , how to make the frequency of a receiver dependant
only on
the NCO frequency ? what i mean is that i want to fix the VCO frequency
the WBX db and make the required receving frequency to be only dependant
the NCO frequency ?

thanks in Advance .