how to photoshop product photography? clothing. CS6, Lightroom, etc.

I have a Canon w/ lighting kit. Was wondering if anyone had any links or youtube links (step by step) on how to photoshop product photography??

(1) I have white muslin (has wrinkles and bends and what not), anyone know how to photoshop a white background?
(2) I really like glossy/shinny/reflective product photography
(example: http://www.wall321.com/Military/Ammu...allpaper_64864)
But, I am not sure if that is suitable for what I shoot (clothes, shoes, etc.). Seems more suitable for metal objects. But, I am trying to achieve that same "wow" factor you'd get if there was a before photo laid next to that photo. Just not sure what adjustments (or even how) to do it.


Any advice would be much appreciated.