Unhappy [Q] [HELP!!] Qualcomm MSM8625...MSM7627a

i have Two Devices from the same vendor, whit the same qualcomm hardware msm8x25 (GPU, RAM and CPU) but with diferents android versions (one with ICS, the other with JB)...

Then i made a JB port for the device with ICS...
The first time I Flashed the rom, it stay on black
screen...

After that, i decompile the boot.img from the device whit JB and
used the BootClasspath on the ramdisk of the ICS device with the port rom...

Again, i flashed the rom and NOW it stay on
bootlogo... i can't do a logcat because the adb don't show the device on bootlogo...

The Boot.img of the device with JB have the same ramdisk files of
my device whit ICS, but with some mods and extra .rc files...

So, You think I can use all the ramdisk .rc files of the JB device with the stock zImage of my device whit ICS and pack it, to make it boot? Or that will brick the phone?

i'll apreciate you answer me, please..