This might be way off the point, but just in case it's a situation where he can't open wordpad documents properly in XP, this might apply:
"Editing registry to fix richedit problem with wordpad, etc"
"To work around this problem, edit the registry and add the EnableLegacyConverters entry with a DWORD value of 1. To do this, follow these steps:
1. Click Start, click Run, type regedit, and then click OK.
2. Locate the following registry subkey:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Wordpad
3. Right-click Wordpad, point to New, and then click DWORD Value.
4. Type EnableLegacyConverters, and then press ENTER to name the new entry.
5. Right-click EnableLegacyConverters, and then click Modify.
6. In the Value data box, type 1, and then click OK.
7. Quit Registry Editor."