Sorry...the theraflu has me going in SLOOOOOW Motion.
First - without the right blower, you can forget getting your hair uber straight. It's just not going to happen.
Second - you need to have your hair pulled taut, using a round, boar's hair brush.
Third, position of the dryer nozzle is critical. You should have the nozzle facing down the hair shaft moving it down the shaft quickly. You NEVER, EVER want to leave the blower on any one spot for longer than a moment.
It's a good idea to practice on the cool setting so you can get an idea of where to place the blower. This gives you an idea of where the air flows.
Lastly - I'll repeate, without the right blower, you can forget it.
BTW - the blower that a have (Turbo 1500) is available at a new BBS on 116th Street, off of Lexington for only $49.
My blower is acting up lately; I may have to upgrade, but not sure which one I'll get.