Welcome to TSG!
Which account are you moving them too? If you are moving them to the administrative account, you can just take ownership of the files:
How to take ownership of a file or folder in Windows XP
If you are moving them to the limited account, you'll need to grant that account access rights.
Right click the file, click
Properties.
Click the
Security tab
Click
Add...
Type the Limited Account name, then click
Check Names
Click
OK
Click the
Full Control box
Click
OK
If you don't see the Security tab, you'll need to turn off Simple File Sharing.
Control Panel | Folder Options (In
Appearance and Themes if using Category View)
Click the
View tab
last item in the list, uncheck
Use simple file sharing (Recommended)
Jerry