RE: first request

hi everyone
 
this is my first email. I am trying to install magento (open source website)
 
I have to instal php extensions:
 
pd0_mysql
mcrypt
curl
gd
 
 
i have searched the php.ini file and only found a reference to gd
 
I have not got a \ext folder in my php folder in the program files 
 
where do i get these extension and how do I install them
 
 
thanks and sorry of this is the wrong list
 
 
Mick
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