either it's damaged, or it isn't a good copy, or something is wrong with your hardware.
Are you sure you're doing a clean install?
Did you read and understand the "method 3" remark in the MSKB-article Papa Echo pointed you to in his answer to your original post. It goes like this:
"If you are not using a retail Windows XP CD-ROM with a hologram (for example, if you are using a burned CD-ROM), try to run the Setup program from a retail CD-ROM with a hologram. To verify this, start the computer by using Recovery Console, and then check the C:\$win_nt$.~ls folder. Look for the Asms folder. If the folder is missing or the files that it contains are zero bytes, the CD-ROM was not burned correctly."
Did you do this check? Was the folder present? Were the files empty?
And finally: did you follow the recommendation to install from an original Microsoft CD with hologram? No need to buy another computer. Just buy the original CD.
Or buy a license only, if you have access to one such CD already (but you say you don't). You'll need the license anyway, and that's the largest part of the price, so it's better to buy the CD, because you might need it again in the future.