The XP Style Leopard Folders software provides Mac format icons and .PNGs that replicate the Windows XP look, making the transition to a Mac feel more comfortable. A system-wide switch can be achieved with programs like CandyBar or LiteIcon.
Changing all your icons system-wide can be a bit time-consuming, but with a program like CandyBar or LiteIcon, it makes the process easy and straightforward. Plus, having familiar folder icons during your adjustment period can help make the transition to Mac smoother.
In summary, if you're looking for a way to make your Mac feel more familiar during your transition from Windows, the XP Style Leopard Folders, combined with a program like CandyBar or LiteIcon, can definitely help.