scapy gsm-um with trx firmware?

Hi list, Since getting Sylvain's transceiver to work with my C118, I started to look at scapy and specifically the gsm-um code as another interesting tool in the fuzzer's arsenal. I see that Laurent Weber's personal website, http://0xbadcab1e.lu/scapy_gsm_um-howto.txt, where he apparently had posted some examples and tips on playing with his code, is no longer available. Does anyone have a copy of those instructions? Has anyone tried running gsm-um with the TRX firmware? Any tips or pointers before I dive in? Cheers, Miguel