You should install all packages inside cups, except the -dev packages.
mp-fremantle-generic-pr is replaced by CSSU, not cups I think.
fakedebconf is replaced by debconf. No problem.
You have nothing to do in the terminal. After installing cups, all
dependencies are also installed. After the installation reboot, or just
enter /etc/init.d/cups restart in the terminal. Then you are able to set up
printers with the webbrowser. Use http://localhost:631 for that.
The rootfs space is not critical, the packages are optified.
There are no backends for IR, IU don't know any for cups, so this will be
not possible.