Fax Detect with Unity Express 7.0.1 with single number for voicemail and fax

So after combining info from multiple sources I've finally gotten it working.

Here's what I had to do:
1. Copy app_fax_detect.2.1.2.2.tcl to flash
2. add a fax_detect service:
application
service fax_detect flash:app_fax_detect.2.1.2.2.tcl
exit
3. Configure fax and mta settings:
fax receive called-subscriber $d$
fax interface-type fax-mail
mta send server [IP address of CUE] port 25
mta send with-subject both
mta send mail-from hostname [name of router]
mta send mail-from username $s$
4. Update POTS dial-peers:
dial-peer voice [appropriate peer number] pots
service fax_detect
exit
5. add a mmoip dial-peer
dial-peer voice [available peer number] mmoip
service fax_on_vfc_onramp_app out-bound
destination-pattern .
information-type fax
session target mailto:$d$@[IP address of CUE]
exit

I hope that the above commands help to point some other people in the right direction.

-Alex