@sancome:
Would it be possible for you to compile a open-vm-tools version that works with DSM 6.1? I installed DSM 6.1-15047 on a 6.0 ESXi. Unfortunately the open-vm-tools_bromolow-6.0_10.0.7-1.spk doesn't install. I get the error message: "This package is not supported on the platform of diskstation or is incompatible with the current DSM version."