try the M21 sniper rifle, there is a patch available that allows you to use it, it also changes 3 of the 4 tents at checkpoint 1 to vehicles
BMP
Shika
UH60
it also adds an ammo dump near your start point and another at waypoint 1
My fave is to take off in the UH60 with 4 LAW rockets and a sniper rifle. Sneak in around the enemy in the village, land the chopper the take off on foot until i get within say 400 meters and them hammer a tank with a LAW, then when things heat up I haul bellybutton back to my chopper, occasionally dropping down into some bushes and picking off those who dare persue...unless i get a BMP after me than I just haul bellybutton and boogy out of there. then I had back and land near an ammo dump and re-arm myself and head off again.
My most memorable mission this far is one time i got caught by a BMP before i could reach the chopper, so I ran into a bunch of woods and hid, the BMP wandered around looking for me for a while and then stopped.. I had 4 grenades with me so i crawled up to within about 30meters of it, it was just on the other side of a bush from me and the gun was pointed away..finally i got the nerve and tossed a frag at it, it landed right under it and BOOM! it jerked violently and there was smoke everywhere, then to my horror that big bellybutton gun came swinging around so ran a few feet and dove again..and waited...and waited...he couldent see me, he was only about 50m away, i turned around and peeked around the bush i was behind, his turret was swaying back and forth looking in the area i WAS in..he was looking for me..I tossed another frag BOOM! again i took off running again, and never looked back...then as I was about 300m of my chopper BOOM crraaackkk BOOM!!, it exploded, the bmp got it, suddenly i started hearing sporatic gunfore all around me, the whole while I was messing with that BMP they had been slowly sneaking up on me..there is no surrender button, I went for cover and took as many of them out as i could, the a machine gunner killed my legs so i just layed...out of ammo...out of frags..our of luck...I was an infant..i just layed there there then i heard the squeaky grinding sound of treads the BMP was on its way..it it stopped 65m away...the gunfire had all stopped...i couldent see the enemy but I knew there were there..what were they waiting for?...I looked at the BMP again..its turret began to slowly move swinging around till it was pointed straight at me...........