When and if the installation is completed and you can successfully boot to XP and Windows 8, then you can install the Windows 8 device drivers and test your access to the keyboard, mouse or touchpad, proper display resolution, USB ports, DVD drive, camera and if everything works then you can connect to the Internet (LAN cable or install the Wireless device driver) to activate Windows.
Finally boot to Windows XP and create another Image Backup (Disk and Partition, selecting all partitions) now that Windows 8 is installed and activated.
How does Windows XP boot after installing Windows 8: Set Windows Explorer to show hidden files and folders. You should now see all the folders and files located in the Windows XP partition. There are three key folders and files in XP (C:\Boot, C:\bootmgr and C:\ntldr). C:\Boot hold the Boot Configuration Data needed to boot to either XP or Windows 8.
You can change the graphical boot menu displayed choices from “Earlier version of Windows” to “Windows XP” by using a utility like EasyBCD. Download and install EasyBCD in the Windows 8 environment (Not XP) and edit the boot menu text.
That’s it, you’re done. Well almost done.
If you have a dual boot computer with more than one disk drive you may have noticed that after booting to Windows 8 and then booting to XP that chkdsk runs before XP starts. If you are experiencing this problem then read then read this article (Windows 8 - chkdsk always runs on a Dual Boot computer) when you’re ready to make a small change to the way Windows 8 shuts down.