no problem man, coz i dulu also had a hard time learning coz din reli wanna ask ppl noob questions but our sifo fred took the time to help.. juz passing down the kindness.
for the aircond off idle screw, can use small flat screwdriver or hand also can .. i prefer hand.
for the aircond on one, use the flower type .. check it out la at ur car la hehehh
for the air/fuel ratio screw use the mini flat screwdriver , or use a cheapo spark plug BP5ES also can .. burn so it'll be easy to bend, n bend the top of the plug so it becomes flat .. And so it will work just like a mini flat screwdriver.
mwahahahha!