Well, the easy way is to copy the scripts-OLSR OLSR-ETX OLSR-MD OLSR-ML to new names, and add like
set opt(sc) rwp11.ns_movements ;# node movement file
..... which can be used as is, when node_(0) is included ...... line 121 in the etx ex
for {set i 0} {$i < $opt(nn)} {incr i} {
and add e.g.
# positions
$node_(0) set X_ 100.0
$node_(0) set Y_ 140.0
$node_(0) set Z_ 15.0
........ see the example 11-script-olsr-etx-rwp11.tcl
$ ns235-olsr-64 11-script-olsr-etx-rwp11.tcl > 11-rwp.txt