Adding more arguments to =CHOOSE function?

Is there any way to work around the limit of 29 arguments with the =CHOOSE function? I require probably 40 arguments when using it and could split it up, but it would just be a big hassle. Is there a similar function that doesn't have an argument limitation or is there a way to code around this?

I'm using Excel 2002.

Thanks for your help

Perhaps you could use VLOOKUP with a table or, adapting CHOOSE, assuming A1 is an integer 1 to 40

=IF(A1<=20,CHOOSE(option1, option2.....option20),CHOOSE(MOD(A1,20),option21, option22,.....option40))