Assuming that %line contains the text of the line selected

var %w = $+("Get $gettok(%line,2,9) $gettok(%line,1,9),") | if ($len(%w) <= 92) { window -x %w }

the <= 92 check is becuase if the "GET <NICK> <FILE>" is over that mirc cant use the window name, this might have been corrected in 6.17 i havent checked. That or using its window handle in 6.17 might work.