Ok guys I am going to make my first Mac upgrade ever and what better than to start with memory. First of all I run alot of Flash, DW, etc, Will 1gb of memory help out alot in these programs? I get around three bounces and then 10 sec. for them to open. I wanna know will my PB scream after I add the 1gb I have 512 now. Will this alter my ext. warranty if I purchase and install it myself will my battery life get shorter, Please help. PB 1.5ghz 15.2 512mb ddr.