Thanks, Oleg!!
Thats it! I wasted a day trying to find an answer..
You can convert these images to simh .tap files using VCP command and the simh itself :)
at tq f77.tap
at rq rsx11mplus_4_6_bl87.dsk
b rq
...
VCP CON F77.TAP/TAP/DRV:MU/MOU:FOR
MOU MU:/FOR
VCP COP MU1: MU: