UPDATE FROM CUBASE 4.5.2

Hello all, I am trying to update from cubase 4.5.2 to Cubase 6, can anybody help me thanks very much

The current model is C7.5.
You could try a retail store. Maybe there are some boxed upgrades still available out there. Most likely, you will have to buy a C7.5 license and use it to run C6.
I saw another thread which indicated that support would provide the installer for older versions.
HTH
J.L.