During your installation, after you make the change from C to D, it should confirm the address before the installation. If it does not, then you need to go back and try just going into the path and change the letter instead of the entire path. If the folder has never been created, it should come back and let you know this and ask for permission to create it. This ensures that you have pointed it to another hard drive.
Now, a simple question. Isn’t your D drive your DVD/CD drive? That is normally the default drive. Check it out in My Computer and make sure that your second hard drive is D and not E.