First try to see if you can upgrade the installation. If the Tomato Garden you downloaded is an image file, then install a virtual CD-ROM drive, then load Tomato Garden and choose to upgrade and install. If it's not a mirror, that's troublesome. I can't explain it in a word or two. If you have a genuine operating system, the manual it comes with contains instructions for installing XP on the hard disk. I suggest you use a virtual CD-ROM drive to process the downloaded Tomato Garden image into .ISO format before installing it.

If the upgrade installation prompt says that it is not possible, then reinstall Tomato Garden and overwrite the original system:

1. Change the first boot in the BIOS to CD- ROM

2. Follow the system prompts to install the entire Tomato Garden on the partition disk where the original operating system is located, usually the C drive.

However, it is best not to touch other disks. The information is gone.

If you must install two operating systems, you must install Tomato Garden on a disk other than the C drive. As far as I know, it seems that you cannot install two operating systems on one disk.