Document Designer - how reference configuration array index number in conditions etc. ?

Content

Suppose we have following 1D string type configuration array:

bulletpointtexts [aaa , bbbb , ccccccccccc , d, eeee, ffffff, ggggg]

I want to add values from this array only if they are in index positions 0 -3 (to prevent the table cell from overflowing in MS Word).    So I need to specify the index position in a condition for a table row loop.

How can I do this in Doc designer, without creating an additional configuration attribute (integer type) to store the index number ? (If we do it this way, all old quotes would need to be reconfigured...ugh)   Can this be done using XSL, if so can anyone provide a sample ?