The VX will not take an OEM cruise unit easily. Where the upshift light is, is the Cruise indicator on any other Civic.
A list of the parts you need:
Cruise control unit
Cruise control pedal assembly
Cruise dashboard switch
Cruise control steering wheel (or the cruise switch on the wheel)
Clock spring that uses cruise control (from any other Civic than a VX)
Actuator unit from under the hood.
Extra wiring to hook it all up since the wiring is NOT in the VX
I've thought about adding cruise to my VX before, but given the availabilty of Aftermarket cruise systems, it would be easier for a less electromechanically inclined person to get one of those and have someone install it.
But if you've got the gumption, there are many DIY threads on
www.Honda-Tech.com to help you out and give you ideas.