Open Question: Can you choose you macbook specs at a retail store and bring it home the same day?

Can you choose screen resolution, what type of hard drive etc... and be able to buy the laptop on the same day? Can they open it up and switch the different parts around? Or do they have to make a phone call, order it, and tell you to come back in a couple days? By specs I mean switching between SSD and HHD, screen res, anti glare, hard disk size,software... I'm planning on buying one when in Hong Kong, but I can't be expected to wait around a couple extra days in a hotel with my roundtrip ticket.