Im about to sit the L.C. 2006 and was in a similar situation to yourself 3 years ago...I didnt know what subjects to choose.
I went with my instinct and chose the subjects i liked and felt i can do well in,because if it does come to your results,its better to get an A in biology for example than getting an E in Physics or engineering.
Sure these subjects may be a little helpful but by no means necessary..thats what flight school is for!
All you need is money(unfotunately) and A LOT of determination..
Best of Luck!!!