I'm trying to go to the US, and I will only be there for 6 days. I want to be able to drive while I'm there. Can I get a temporary license?
The thing you want is an International Driving Permit (IDP).
Do not fall for the "international driving licence" scams, you just need the IDP. They are usually easy to get from the same place where you would apply for a driving licence. Here in Thailand, you can get one from the Department of Land Transport, and in the UK I have got one from the Post Office before.
The permit is valid in every country except for the country it is issued in (because you should already have a driving licence in that country in order to qualify for the permit, I guess).
The cost is nominal (not a lot), and validity is one year from the date of issue.