Excel 2007 : rank results to also show text

[feno1]

hi all,

so I am building a racing scoring chart, I need to range a set of cells and bring back the order of placings, but I also need to show the following when they appear

• "DNF" needs to read as "DNF"

• "DNS" needs to read as "DNS"

• when it is blank it will error so I have written an error formula to avoid this, I would like to write something else like an IF that vbrings back "" if it errors

The current formula I have works for everything but "DNS"
=IFERROR(IF(J3="DNF",J3,RANK(J3,$J$3:$J$32,1),"")
If someone could help with this i would be most grateful.

James