There is no configuration issue with Blitz3D. DX7 does not support it, that simple it is. DualScreen and High Resolutions are a DX9 only feature.
As you only need it to tweek stuff, WinBlitz3D should do the job (its commands are very similar to BlitzPlus)
The alternative is a twin application approach -> 2 B3D applications that communicate with each other through tcp for example
As you only need it to tweek stuff, WinBlitz3D should do the job (its commands are very similar to BlitzPlus)
The alternative is a twin application approach -> 2 B3D applications that communicate with each other through tcp for example