The quest series can also be omitted. Gives only some money in three of the fights. Alternatively, you simply install gorilla arms and sandevistan for the 6 boxing matches. Can find everything in NC and the fights are easy to pass. Or if it's to be easy, throw a weapon on the ground in the boxing ring before you start the fight and grab it at the beginning of the fight with R so that it's immediately equipped. But be wary that you have a non-kill mod in the ocular or the weapon.