Adding attributes

[vpervades]

Hi ,
Thanks for your hint.
I have started doing custom code and i will share with you people soon.
But before that ,Where is the add to cart function exist?
I have changed the price in product detail page ,but it didnt reflect in the cart page .
Any useful guidelines to accompany this ?

You would need to write custom javascript or PHP code for this function. Don't even try it unless you are proficient with the language(s).