Relative Rezzing Ridiculousness

OK, my brain's done here. I have an object where X points forward and I want that to rez and object relative to it (e.g. along it's local axis), in that if I give a rez position of <0,2,0> it will rez it in that position, relative to it's own rotation (so it will still be rezzed to the side). Am I making any sense here? Basically, I'm fine as long as I only want to rez it offset along X, e.g. <1,0,0>, with something like this:

vector pos = llGetPos() + rot;

It rezzes in the right position 1m in front of the parent object along the parent's X axis. But, I'm obviously being a rotation dufus here as I can't get anything to work no matter what the rez position is.

Can somebody please put me out of my misery? Rotations aren't my strong point

You want something like:

CODE

vector pos;
vector offset = <1, 0, 0>;
pos = offset;
pos = pos * llGetRot();
    (or maybe llGetRot() * pos, I can never remember, one will compile, the other won't).
pos = pos + llGetPos();
llRezObject (..., pos, ...);

That is to say, you want to rotate the offset from the parent object (the offset mind you, not the world position) by the parent's rotation.

Bang on Wednesday, ta