Is the 10.6.x machine a 32-bit CPU (Core Solo or Core Duo)?
If so, then it's a non-starter. The package cannot be modified to install on your machine because it only contains code compiled for the 64-bit instruction set.
If it's a 64-bit CPU (Core 2 Duo or Xeon or Core iN), then there might be some potential for hacking to get it working - but I have no idea where you'd begin.
On the other hand, if it has a 64-bit CPU, why didn't you upgrade to Lion and/or Mountain Lion? Lion can run on every Mac with a 64-bit CPU, and it still receives vendor support.