I tried it now it sais cp: /opt/local/lib/libreadline.5.2.dylib: No such file or directory
Check the top level your HD, is the 'opt' folder there?
EDIT- Did you unzip that rapidshare file onto your desktop? If so, you should have a folder on your desktop called 'opt', if you go into the folder you should find:
Desktop/opt/local/lib/libreadline.5.2.dylib