What equipment is used by Boeing to convert the F-16 into an unmanned aircraft (QF-16)?
THE USAF has had a program for converting manned aircraft into unmanned ones for decades. The aircraft used so far include,


QF- 104 (from F-104 Starfighter)
QF- 102 (from F-102 Delta Dagger)
QF- 100 (from F-100 Super Sabre)
QF- 106 (from F-106 Delta Dart)
QF- 4 (from F-4 Phantom II)




Note that both aircraft are piloted. According to fencecheck.com,


  (QF-4s are)..almost always flown with a pilot aboard, unless a weapons launch will occur. Usually he does not touch the controls but stands ready to take over if ground control is lost or the aircraft departs. The pilots fly the aircraft themselves on chase missions and to maintain proficiency.


The QF-16 replaces the QF-4. The conversion of (retired) F-16 to QF-16 involves the following steps:


Removal of non essential items like the Vulcan cannon and the radar (in previous versions like QF-4, the radar was simply deactivated)
Modification of the FCS (Flight Control System) so that both manned and unmanned flights are possible (previous drones were remotely flown)
Installation of Flight termination system to destroy drone in case of flight path deviation, which results in this:




Source: f-16.net


Installation of onboard telemetry systems to control the aircraft from the ground.
Installation of a scoring system to measure the missile success rate. This is required as most of the missiles are launched with dummy warheads or the flight path is programmed to evade the missiles, so that the costly aircraft could be reused. Only in a few cases are lethal missiles used.
The self protection suite (flares, chaffs etc.) are usually left on the aircraft to provide a realistic engagement scenario.
New paint job :), which looks like this:




Source: www.wired.com

It is possible to convert (any) other aircraft into drones. For fly by wire aircraft like F/A-18, only the software portion will change, but it is a minor thing.