Algo así?
nNumber = "10000"
nNumber = (nNumber:reverse());
rNumber = "";
repeat
sNumber = (string.sub(nNumber, 1, 3));
nNumber = (string.sub(nNumber, 4))
rNumber = rNumber..""..sNumber..".";
until #nNumber <= 3;
rNumber = (rNumber..nNumber);
nNumber = (rNumber:reverse());
Label.SetText("Label1", nNumber);