Value list custom values order

Hi and Thanks for any help.

I currently have a value list based on field contents, and I use that value list as a custom sort order in the sort records dialogue window. Lets say the values are January, February, Mar... thru to December. My records are then sorted in this order. Problem is I want to change this sort order regularly. I may want to sort by March, then July, then October, then January and so on. Currently I have to edit the value list every time to customize the sort order. I would like to have "handles" on the value list entries so I can drag them up or down the value list, thereby changing the sort order. Is there any way to achieve this? Or is there any way to automate the procedure of changing the value list contents?

(FYI: I'm only using months as an example - in fact there are about 20 or 30 different values in the value list, so re-ordering them every time is a major pain)

Dale