Custom search order for Project Center views

[Robert Waters]

I have an enterprise project text field with acceptable
values of Red/Amber/Green/Unassigned. Other than changing
this to 1 Red, 2 Amber, 3 Green, 4 Unassigned, does
anybody know how I can maintain this custom sort order in
a Project Center view (rather than alphabetical order,
i.e. Amber, Green, Red, Unassigned, which isn't very
helpful!!)?

Thanks
Rob