Move rows within a table using buttons

Hello Guys,

I am trying to create a dynamic table and I have been trying to figure out how best to do it. Here are my requirements

1) The table will have 12 rows, the number of rows will not change.

2) The table will have 2 columns.

3) The point of the table is for the user to reorder based on priority.

4) The data must persist when saved (this one i know how to do).

I have been creating a subform around a row and adding a up and down arrow buttons to each one. I was going to use a moveinstance command but I don't quite understand how the indexing will work.

If you guys have a better suggestion or an example, i would really appreciate it.

Thanks,

roger.