I surely hope you don't think on relying on the farsight for the Crash Site Perfect Agent Unidentified Flying Object Shot.
I have hit it from a little further back, but I've searched and searched and most of the time it's like, impossible to find...Actually, I think I just came up with strat right now, come to think of it...
(And I mean, I know where it's at, you can zoom in and even find the turrets that are nearby, but I've searched that whole field area for like 5 minutes and couldn't find it.)
I think it was just that I was too far back...if that's the case, then I should be able to get around 1:27, just like SA.
By the way...the strat for Agent/SA is simple.
Don't go down into the cave/hole where the clone is; instead, keep going into the cave area to the leftish, and pull out your mines. Head to the left, and look down a big crack/hole thing in the wall and throw a mine, you will see the bot thing sitting there, detonate when it goes a bit passed him, continue...and you will be up the hill part (first place real pres. goes when he follows you). throw a mine at these 2 bots, detonate and drop off as you switch to unarmed, hit trent...then make pres. good, when you get to the final spot, pause and pull out scanner, hurry up and zoom in and kill fake president.
Same strat for A/SA, except SA has that extra objective at the start and stuff...