first you shouldnt have bought a omnifi, when i was selling them i found the controller not so reliable n very slow while navigating with the knob. depand of which headunit you'r using i will have suggest a ipod adaptor (pioneer, clarion especialy)
Are you using a RF mod or a direct line in ??
for the installation i suggest to fit in in the lower console behind the shifter in the "sunglass holder" like i called/used it on my car