T.38 FAX on Asterisk 1.6

Hi, will FreePBX support Fax over IP with Asterisk 1.6? I don’t know how to install app_rxfax and app_txfax from SpandSP on Asterisk 1.6. The source code no longer included in spandsp0.0.5pre4.tar.gz anymore. Is there anyway to fix this up?
Does anyone know how to use SendFAX and ReceiveFAX applications of Asterisk 1.6?

I’m also interested in the status of T.38/ReceiveFax for 1.6 and FreePBX. Any plans?