Ok, anyone who suffered the same Sectoid medic problem as me two posts above, just to let you know a solution as i managed to find one myself (but thanks to russ anyway):-
Discontinue the research as soon as possible by reducing scientists to 0 (this stops time ticking away and accidentally finishing it).
If you have a sectoid leader, research him first and THEN the medic. For some reason doing it this way round solved the hanging problem.
Also note that i had tried to research other tech before by cancelling the medic, researching something new and the resuming - but it still crashed.
MAYBE it has to be a leader or a commander (i got my leader from a base) and possibly even the same race - i dont know.
Either way - problem solved
