Most Custom Versons will include their own runtime installs packaged but for those versions that don’t. I’ve uploaded both DX7/DX8 Runtime installations.

DX7 runtimes is used for EO 2.0 and EO 2.3 based engines:

DX8 runtime is used for EO 3.0 based engines:

EO 4.0 already has their own runtime packaged but here’s that installation also: