Installation of TN Console 6.5 and Developper 6.5 on Windows

Dear forum users,

We are trying to install both tools Developper 6.5 and Trading Netwrok Console 6.5 on a computer with Windows VISTA 64 bits.
When we launch the 6.5 installer, we can’t find the both tool in the list of possible components to install.

We have tried to launch 7.1 Installer and in this case, it is ok.
However, the installed 7.1 Client components are not compatible with our “old” 6.5 Integration Server !

We need to install both tools with version 6.5 on a computer with vista 64 bits
Is there a solution ?
Thanks a lot