install plug-in question

  Hola, by re-installing X1d Producer Expanded from scratch on a freshly formated HD, I UN-CHECKED the option to install Guitar Rig 4 LE 'cuz I had already downloaded the upgrade to Guitar Rig 5 Pro to install, so later when going to start a project the 'Insert From Track Template > Audio Track Templates > Guitar > [Nice Clean Guitar]' I got a 'Missing Plug-in' warning - letting me know that GR4 wasn't there, duh. My question is - Do I have 2 install GR4 LE since it came with X1, or since my older GR4 Pro version is better, can I just go back to the other HD and copy the GR4Pro.dll file and paste it in the '...CW\Vstplugins' folder or will that screw-up the GR5Pro that is already installed ? Thx