Is it possible to use this on a "network everywhere" b router.... it uses the same base software as linksys just different colors, ect. or does anyone have any sugestions for firmware?
No, that will not work, you need the exact same hardware as listed. The Tarifa firmware is for WRT54G models V1 to V4, WRT54GL V1.x, WRT54GS V1 to V3 and WRT54GS V4.