Yes you can. You actually can get suspended for using a modded contoller on any game.
You can mod Halo Reach with a Jtag, A Modded controller from GamingModz or another Hacking device, The Only thing is just don't go online because people will report you and you will get banned!
It depends on if bungie sets mod blocks. If they didnt then it should work on guns like the plasma pistol and magnum.
you get banned from Xbox Live. If you do ever get banned its because of glitching modding. Since I'm a glitcher, i have to be careful of what i do for my glitching have never gotten banned, but i think Bungie found out what i did and now i cant do any SHOOTIN AND LOOTIN achievement's on campaign
If you get banned then you can't play.
no
they go from 28-30 mph if modded they can reach 40 mph
The fastest way to rank up is to boost in campaign. Search "halo reach campaign boosting" on youtube =)
you get banned by modding credits instead of earning them yourself
Comparing normal difficulties: Reach is longer
you already are when you are in campaign
no halo "campaign" is a single player game
cause it does you are actually getting them unless u suck at campaign