I have Macbook Pro (late 2007) and I would like to upgrade to 4GB of ram. Can I buy 2x2GB of ddr2 ram from any producer (which is much more cheaper) or I have to go for more expensive Apple upgrade kit?
You can buy almost any RAM, no need to go via Apple. Maybe look at MacSales or Newegg. Upgrading RAM in MacBooks and MacBook Pros (includes links to online shops with the appropriate RAM)
Get ram from Crucial or go to store that sells Crucial memory (like MicroCenter). The Crucial website has a system scanner that will tell you what memory is required for your MBP and how much you can put in.
Get ram from Crucial or go to store that sells Crucial memory (like MicroCenter). The Crucial website has a system scanner that will tell you what memory is required for your MBP and how much you can put in.