if you want to destroy it, using a script, without using loads of bombs, why not try a simple
LST_name setdamage 1
if you want some explosions, why not try
_x = getpos LST_name select 0
_y = getpos LST_name select 1
_dir = getdir LST_name
_i = 0
#loop
_r = random 10
_bang = "laserguidedbomb" camcreate [_x + (_r*sin(_dir)), _y + (1*cos(_dir)), 20]
~random 5
_i = _i + 1
?not (_i>=20):goto "loop"
exit
that will create 20 of flashpoint's most powerful explosives above the LST at random intervals at random points along the ship's length. i think