Text Curve space,,

sory for my bad english,

I have read this tutorial

http://flashscript.biz/Flash10/curvedtext/curvedtext.html

but i’m confused with the math formula, because the text too tighly when i changed text with 15 degree curved text, and when i changed the path width and height, its too far from centre point, how to make that ‘text space’ for 15 degree in same position,

like

ooshirts.com

thanks before,