In the stone ages, on Windows XP, if you try to rename something like BerlinXYZ.rdl to SydXYZ.rdl, using command prompt:
rename Berlin* Syd*
it will not work since it will rename the files to SydlinXYZ.rdl
Where it has some junk characters after the Syd prefix.
A very nice free renaming tool without install is called:
Lupas Rename 2000
*Comand prompt's rename will work properly if you're on Windows 7.