Yes both the sims are working. There is a option in the gravity box setting to hide one signal. You can load the latest version of both x framework and gravity box by removing the old. This rom is reallly good and the developor has released version 3 for this rom.
Also is there any sloution on the compass error / because the problem still continues.
I m using this 4.2.2 and if interested pl have a try. I earlier had mcirofire3.2 by akash akya.
http://ucupbudug.wordpress.com/2013/12/06/update-rom-upgrade-to-jellybean-4-2-2-for-cross-a26lava-iris-501prestigio-5000/. i am testing it from last week and is with no major bugs. But still the compass is not working correctly.