I think Federal Loans and GradPLUS are disbursed directly to the school and then once tuition and university fees are paid, the rest is mailed out to you. So, in other words, I'm pretty sure you'll need another, probably private loan to pay for the other expenses (if you absolutely must borrow money for them).
Talk to your financial aid office -- they might have a particular loan for this kind of situation. There are ones for buying laptops, I know, for example.