Try here - mailing list (link is at DFBSD web page)
-> IRC channel: #dragonflybsd on EFNet
To be honest I don't know what is your problem?
3g usb-modem or DFBSD setup?
For DragonFlyBSD setup, try handbook or new handbook (can't post links, due to new member post limit)
Code:
pkg_radd -v nano mc links modular-xorg-server modular-xorg-drivers modular-xorg-libs modular-xorg-apps modular-xorg-fonts freefonts openbox
with ethernet internet connection and then edit all needed files.