multiple questions

[blueskin]

hi, first time poster but long time lurker
roads? are there any and if so does anyone use them, are they faster than offroad? im planning on a combat eng cert so mining the road would be nice. um also will a mine/boomer take out light buggies or tanks how many does it take?
second, can you jump onto vehicles? as in ride on top? both enemy and friendly or do u get instant run over from below (like halo) thinking this as an infil to plant boomers on tanks. so yeah next question, can u place boomers on vehicles?
plasma grenades, do they stick to things or just the 'fire' stick to them, in which case can u hurt vehicles with them?
does the amp/repeater/ non laser weapons have muzzle flash and if any dont which ones, i.e. can a good infil pistol snipe without being spotted?
last question what is the prerequirements for antivehicle cert?
thnaks in advance, lots of questions :P