By using Multiuser Server facility of Macromedia Director 8.5(*1), the program was controlled from ServerPC to ClientPC in which the digitized movie data was through ethernet.
Matrix Switcher MRX-505H(*2) for variable projection from ServerPC and the shutter for making the perfect black out were sereal-controlled.
*1 *2
ServerPC:  DeLL Pentium Xeon 2.2GHz Dual CPU
ClientPC1:  DeLL Pentium4 2.2GHz Single CPU
ClientPC2:  DeLL Pentium3 550MHz Dual CPU
ClientPC3:  DeLL Pentium2 450MHz Dual CPU
ClientPC4:  Intergraph Pentium3 550MHz Dual CPU
OS:  Windows2000
HD:  HDD 200GB / IDE I/F Ultra ATA/100
(All ClientPC loaded.)
Software:  Macromedia Director 8.5
Diretor Xtra:  Serial Xtra
DisplayRex Xtra
DateTime Xtra
MatrixSwitcher:  IDK MRX-505H