@Berty McJock,
to clarify on how i saw time, because i believe i'm still vague lol.
so, for the sake of arguement, all time exists everywhere.
it is our movement through space, and interaction with things which gives the impression of directional passage through time. as they say, it's all relative.
e.g. if i move in any direction in 3d space i only move in that direction relative to where i came from. i didnt come down from what's below me. it's the same with time, we move forward from our last point of reference. the only point in time that is really relevant to us is now, the present, as this is the only point in time we can directly experience. (bear with me, i hope i'm making sense. i know what i'm trying to say, but it's hard to explain it with my simple mind lol).
this doesn't meant that past, present and future cannot co-exist, just that we percieve it from our experiences as moving forward through time, forever in the present, and this will remain true, even if we master time travel. we may invent machines that can transport us to a different point in time, using whatever means, but our own personal body clock will keep ticking forward, it's rate dependant on how fast we are moving through space, but always forward, as we percieve it.
therefore if we are on a fixed path forward through time, and the future already exists, because time is time,and it's only our perception of points in spacetime as we move which gives us a sense of tense, then our future is predetermined.
i know i have left gaps in this, and probably only confused things more. i understand it when i read it, but putting it into my own words is another story lol. i think it was brian greene's "the hidden reality" which explained this best to me, and makes a lot more sense than i do.