Hi everyone, I am planning to upgrade the RAM in my wife's 13" MBP (mid-2009). Currently it has 2GB. When I upgraded the HDD to 500GB, I didn't pay attention, but I vaguely remember seeing only one 2GB stick in there. Is that the case? If so, is it advised to buy a "matching" 2 GB stick or 2x2GB new ones? Secondly, I have some Officemax gift cards to use before the end of this month, and I realized that they carry Crucial memory. Crucial website states the compatible memory for the mid-2009 13" MBP as "DDR3 PC3-8500 CL=7 Unbuffered NON-ECC DDR3-1066 204-pin SODIMM". Would this work in the 13" MBP? CT25664BC1067 at OM CT25664BC1067 official site Thanks very much in advance!