Does anyone know where can I puchase certain scripts. Or any place where I can buy custome scripts? thanks

I guess that you want a custom made php script so try this place.

http://www.phpscriptcenter.com

Also, I suggest that you first make a thorough search through the search engines because chances are that what you want is probably out there and probably free.

this may also provide some solutions for you...
http://www.hotscripts.com/PHP/