Try my version, it seems to work according to others (I sttil didn't have time to test it):
Are you sure you used the latest supersu? Yours is much smaller than mine.
D5503_14.6.A.0.368_Customized_DE_prerooted.zip
I made a prerooted, flashable zip with lockeddualrecovery 2.8.21 (for locked bootloader): D5503_14.6.A.0.368_Telenor_NO_prerooted.zip
Did not test it yet, so to flash it on your own risk!
I just patched the latest Boeffla kernel, works for me like a charm. No scripts needed, just a patched modem.
I cannot post links, just a try: d-h.st/gWi
I take absolutely no responsibility for it though.
Anyone having issues with dialer screen not appearing? After a few calls the HTC dialer screen won't show up anymore, making phone calls quite difficult. :)