Sometimes a file may have been added to CVS with the wrong name or in the wrong location. Recent revisions of CVSNT support renaming. If your CVS server does not, you will have to copy the file to the new name and perform a CVS Add and a CVS Remove followed by a CVS Commit.
If your CVS server does support renaming, renaming a file is simple:
Right-click on the file and select to bring up the Rename Dialog.
Enter the name you want the file to have (if you want to move the file, enter the desired relative path to the file).
Click OK.