Bitcoin-Qt setup: Change block-chain file location, settings? documentation?
Here:


https://en.bitcoin.it/wiki/Bitcoin-Qt
https://www.google.com/search?q=bitcoin-qt+documentation

Use the -datadir option.
Right-click on your bitcoin-qt shortcut, press properties, and add -datadir=D:\Bitcoin
Go make that directory, then run bitcoin. If a bunch of files show up in there, you've done it correctly.
Yep.  


-datadir
File > Backup Wallet

Yes, but not GPU mining. GUI miner is a nice option though.