Flex :: Sorting - Best Way To Custom Sort A Flex Array?

Here are the strings this array can contain (in the correct order):

'recipients,' 'columnSelector,' 'headerImageLink,' 'title,' 'mainText,' 'text,' 'bodyImage'

Now, to sort them, I obviously don't want to do something like this:

if( a == 'columnSelector' && b == 'headerImageLink' ) return -1;
else if( a == 'columnSelector' && b == 'title' ) return -1;
else if( a == 'columnSelector' && b == 'mainText' ) return -1;

So that brings up an interesting thing. I know you can optimize the above some using something like this:

if( a == 'columnSelector' || a == 'bodyImage' ) return -1;

This would get the last two, but lately I have just wanted community input on issues I have had in the past. So the question is, what is the best way to write a custom sort, using a relatively random order (not alphabetical, etc)?