Hi all, I am new here. I am going to buy a IBook or maybe a Pbook soon. I would buy some additional ram for it, but not from Apple as many threads here say. But I have such concerns: Can I intall the ram by myself or have to have it installed by someone authorized? Will the installation of the new ram affect the warranty of the computer? I know, in most cases, you are not allowed to open the case to install new hardwares, otherwise the warranty is void. But there are many thread encouraging people buy additional rams from somewhere else, say from Crucial. Thanks for your help in advance.