Hmmm.
Honestly, what you're asking for is not really supported in the SR4 mechanics, which is why it's not really on the forums. The 2070 tech is not yet at the point of having a parachuting, bipedal robot soldier replacement/companion. (However you can start with a person, and build in enough metal that they're BASICALLY a robot, but it's not the same)
As a one off, this really sounds less like a '
piece of equipment' and more like an
NPC companion, at which point it's not really a statting exercise (as is, you've already had a great adventure, and no real stats required...perfect

)
So, my main recommendation is to grab an NPC Stat listing, give it to the GM with a couple of mods as per first post, and then just have a Robot companion with you.
If you really want to drill into this, then everything I'm about to write is
IMHO only, not RAW

A) Why not give the robot a Skillwire set, and purchase combat programs as required. This just 'gives' the robot the skills required, as per however many you buy (I recommend the quad-chipslot option, so 4 SkillSofts can be loaded at once).
-- And would also explain why the bot can drop from a plane (Parachuting/Athletics skill?), act as a HumVee gunner (Gunnery skill) and then a Pilot (Drive: Ground Vehicles skill)
B) Other programs can be similar, but less combat oriented, and already integrated into the Robot hardware/software (First Aid, Map-making)
C) Autopilot should be fully maxxed out, as should sensors and a gyroscope stabiliser... just to explain the ability for a Robot to carry a body and make a map of the area for you, these things are mandatory.
Either way, you're a long way from any canon rule-sets, so just discuss with GM, agree on some stats and abilities, then go forth and adventure
