Hello,
here is a brief explanation on how to install XP on a Mac.
Prerequisites are an Intel Mac with OS X 10.5 or above (OS X installation CD ready) and a Windows installation CD (Service Pack 2)
And here we go:
1. Run Boot Camp (you can find it in the Utilities folder of 10.5 upwards)
2. Select size of XP partition
3. Click "Install"
4. Mac will restart
5. XP Blue Screen Installation Screen will start
6. XP Installer will then load the individual drivers etc.
7. Showing the next screen to select the partition
8. Select the Boot Camp partition (FAT32) and press "Enter"
9. Next screen will ask you, which method of disk formatting you'd like (normal, fast or others)
10. It is best to choose NTFS quick format.
11. Formatting disk
12. Files are copied to the installation folder
13. Mac reboots
14. First, screen will go white, then black and short time later the XP logo with the loading bar appears
15. The installation will continue as usual
16. When the installation is finished and XP is up and running normal, put in the OS X CD1 and all needed drivers will be installed.
Now you can begin to install your software for Windows systems.
Important: On startup, please select which system you want to boot.
In order to do so, you'll have to hold down the Alt key when you start the computer.
Then click on the Windows icon.
This should also work with Windows 7