Here is a formula that I have working (it is long with lots of IFs and
repeated many times in my spreadsheet):
=IF(VLOOKUP($B10,'[Another
File.xls]R'!$B$2:$W$20,22,0)="Remediate",1,IF(VLOOKUP($B10, '[Another
File.xls]R'!$B$2:$W$20,22,0)="Minimum",2,IF(VLOOKUP($B10,'[Another
File.xls]R'!$B$2:$W$20,22,0)="Superior",3,IF(VLOOKUP($B10,'[R1 Fitness
2007.xls]R'!$B$2:$W$20,9,0)="Opt - In","|",IF(VLOOKUP($B10,'[Another
File.xls]R'!$B$2:$W$20,9,0)="Opt - Out","O",IF(VLOOKUP($B10,'[Another
File.xls]R'!$B$2:$W$20,11,0)<"","M",""))))))

Two Questions:
[1] How would I wrap ISNA around this?
[2] Is there a simpler way of writing the formula?

Thanks.