This is my config for winvice:
executable cmd
args /c IF EXIST "[rompath]\[name].d64". (cd "PATH TO EMULATOR" & start /wait x64.exe -fullscreen -autostart "[rompath]\[name].d64".) ELSE IF EXIST "[rompath]\[name].crt". (cd "PATH TO EMULATOR" & start /wait x64.exe -fullscreen -cartcrt "[rompath]\[name].crt".) ELSE IF EXIST "[rompath]\[name].tap". (cd "PATH TO EMULATOR" & start /wait x64.exe -fullscreen -autostart "[rompath]\[name].tap".) ELSE (cd "PATH TO EMULATOR" & start /wait x64.exe -fullscreen -autostart "[rompath]\[name].t64".)
"PATH TO EMULATOR": Emulator path with quotes.
romext .t64;.d64;.crt;.tap