Now, my flatmate is keen to resurrect our old dynamic duo (Hunter and Rusty) under the SR4 rules. Now hunter was a 1M

The problem? Much of what Rusty did has changed or has not yet been covered in the 4th edition rules. He was also a 1M nuyen character, but rusty was a master tactician (Small Unit Tactics) with a Tactical Computer and a few tricked-out drones acting as his eyes and ears as he sat in a tricked-out van nearby. Sitting feeding orders and tactical analysis to Hunter no longer gives any listed benefits, and the v2.0 matrix seems to change a lot about what works and what doesn't.
With the new matrix, i'm thinking that it may be practical for Rusty to take a step out of the van and turn him into a more hands-on rigger, and possibly even a full hacker. He was always good with computers, and he was contemplating becoming a decker if he ever afforded/found a functionable deck. At the same time, rusty is very cautious, to the verge of paranoia, and tends to prefer the tried and tested over the new-fangled and flashy. If he did send a physical presence on a run (or to a meeting, even with people he trusted) then it would probably be one of his drones (not all of his drones were Steel Lynxes, some of them were socially workable) rather than his meatbod, unless hunter 'insists'.
Basically, I know I can't expect you to RP my character for me, but I'm just wondering which way would it be best to go with him under the SR4 rules?
Is it viable to go Rigger/Hacker or is that too much of a draw on funds? (Particularly a cautious one who'll have his defenses versus intrusion maxxed)
Although I'd guess that hacking and rigging is still all doable via remote link, are there any particular advantages to going in with the team to get the job done?
Is the logic attribute really that important for the cracking skills? It seems that they're linked to logic but mostly rolled as skill plus program.
If I buy a high-rating firewall, can I copy it onto all of my devices or just one? What about after programming my own firewall?
What level of security would people class as 'adequate' so that they're not going to be hacked into on the fly by a security hacker? Similarly, what level of hacking skills would be adequate to hack an average target? (Classing an average target as a run-of-the-mill car)
Are there any suggested mechanics for SUT under SR4?
Is it worth it to max (or even just have a high) edge? Rusty was never the one to take chances, but as the rigger/decker I can see it sometimes coming down to his actions to make or break the run. When the drek hits the intake and you're being swarmed by goons, a single superhuman hack is perhaps more useful important than a single shot between the eyes.
Comments? Suggestions? I'm working on a first draught now.