Really? Sorry fellow but this question asking for RTFM.
To instantiate any device in netlist unique name is needed. So to instantiate device, for example simple resistor as vector, you need to provide a proper name.
R0<9:1> NET_A<9:1> NET_B<9:1> resistor 1k
Above line instantiate 9 1kΩ resistors with one leg connected to 9 nets NET_A<9>,..., NET_A<1>, while other leg to NET_B<9>,..., NET_B<1> respectively.
R0<9:1> NET_A NET_B resistor 1k
While this line instantiates 9 1kΩ resistors in parallel connected between NET_A and NET_B.
In Schematic editor, simply edit name of instance and add brackets with proper list order.
In your virtuoso installation directory is a doc/ subdirectory containing a lot of helpful materials, with tutorials too.
You can also access them from CIV→Help menu.