If you’re using systemd (12.1 onwards), then this Gentoo wiki page suggests creating /etc/systemd/system/wicd.service
[Unit]
Description=Wicd Network Manager
[Service]
Type=dbus
BusName=org.wicd.daemon
ExecStart=/usr/sbin/wicd -f
[Install] WantedBy=network.target
Then able the service with
systemctl enable wicd.service