Having some trouble with this Mod on a fresh 1.1 KSP install.
1. The first Oxygen is somewhat high in the tech tree, and the mod did not include oxygen in the default capsules. Luckily, the CO2 scrubber works, but eventually my Kerbal suffocated while flying around in an aircraft at 12km.
2. The only antenna that had the Relay option, was the one included in the Parts folder. The antennas that are located in the SQUAD parts folder did not get edited by the mod, and thus have no relay option. I copy & pasted the MODULE from the Short Antenna CFG file into the other antenna CFG files, and they were able to enable the Relay function, but they have the same range as the basic 8 antenna.
