First off you need a Hex editor, next you go into your saved
game if it's a new game you might need to let it run for a
minute in order for it to work and search for 0014 0000 0014 there
will be about 5 of the 0014 (which is 20 in hex) in close
proximity to each other and these will be the amount of percentage
points alocated for each area of research from there you can
just change the numbers to whatever you want i.e 00FF would
give you 255% in whatever field you want.
Now although you can do this for every field just be careful that
you don't lower the percentage points for any field over
while the game is running as this will cause all research in
that field to stop since all the other R.Ps are in other fields.