Changing Central Meridien for Map of Newfoundland and Labrador

Hello,

I am attempting to display some data over the entire province of Newfoundland and Labrador, and the Lambert Conformal Projection would be perfect, if only I could alter the central meridien.

I began by following this thread: http://forums.arcgis.com/threads/935...gth-into-miles

by using the tool Calculate Central Meridian And Parallels (Cartography), however, I am consistently getting "Warning 001027: Coordinate system field must be at least <455> characters long to contain the results for these features."

I have created fields of text over 600, 700, and finally 800 characters long, yet the same problem and Warning 001027 is arising.

Is anyone able to help and tell me what's going on?

Thanks
Donald