@orplidmeinland
Sorry. I'm correcting my typos.
My OS is Windows 7 Ultimate (up to date).
Your proposed layout correponds 99% to mine - with the exception that your "C:\Opera" and "D:\Opera" are "Drive:\Tool2\Opera" on my system, the permissions for the first drive are "Full access for Everybody" and I used mklink /J in the first place.
Regards
Damiel