3) I can boot OS X from the new HDD and boot Win7 from the BootCamp partition in the old HDD in the OptiBay Where I'm stuck is how to just partition the old HDD into a single Windows partition.

If you're trying to install a new operating system or flash your BIOS, you're going to need a bootable USB drive - here's how to make one.

The partitions contain bootable installers with every OS X version from Tiger on up to El Capitan. It's great for troubleshooting or upgrading just about any Mac model I come across.

Windows allows you to create multiple FAT32 and NTFS partitions on a USB or External drive using Diskpart, Disk Management, MakeWinPEMedia.

If Windows Setup couldn't create a new partition or locate an existing one during a clean install on your PC, use the fixes in this post.

Jesus Vigo shows you how to create bootable USB flash drives that are used to install just about any OS on your computer with the help of Rufus.

We've written at length about how to create a bootable installer for Lion (OS X 10.7). Lion DiskMaker simplifies the process.

A bootable USB key is a convenient way to install operating systems on netbooks without optical drives, or carrying around a Live OS with you at all times. It especially makes sense if you're ...