Photoshop CS4 installation help!?

I have to edit a photo (makeup, hair color, etc), but so far I do not understand! Does anyone have tutorials or perhaps you can explain? Thanks!

This is my favorite site for makeup etc http://www.photoshoproadmap.com/Photoshop-blog/2007/05/15/a-complete-guide-to-digital-makeover-in-photoshop/

Photoshop Tutorial | Make-up Tutorial