@Christoph-Zembrowski Yes, I believe that is one of the repositories that opkg consults.
Along with two others it is listed in the opkg configuration file /etc/opkg/distfeeds.conf
Once you have done a opkg update the command opkg list will list all packages available from all known feeds
Additionally, if you have obtained a ???.ipk file for a package and copied it to your Omega, you can install it using:

opkg install <path to .ipk file>

though you may possibly need to take care yourself of any other packages it may depend on