NO! regardless what you are advised by others in her, wireless will not work! you can use ps2, you can use usb - but wireless need software communication! you cannot use wireless without first establishing communication protocol!
have look at wireless routers, switches, modems - all of them need either, network cable connection or have build in programming interface, be it ps2, db9, db25, rj45 or any other for programming, AFTER you programmed it, then and only then wireless will come to play...
for choosing primary boot device you need to access bios, you will have which KEY ON THE KEYBOARD!!! to use to access it, unfortunately - some cable is involved...
and yes, i do work (on/off - i study medicine...) with computers since 1964...