LAB and Pantone+ CP conversion problems

When converting from LAB is it possible to change the default look up library from PANTONE Solid Coated to the Pantone+ Color Bridge Coated?

Example:

Set up a new job using all Pantone+ Color Bridge Coated. This creates all swatches as "Process Color" in CMYK Color Mode.

Client request is to have some Spot Colors.

EXAMPLE: I take the "PANTONE 7408 CP" and rename it to "PANTONE 7408 C" change the color type to Spot Color and then close the window. Reopen the spot and change the Color Mode to book. All good now I have a PANTONE Solid Coated.

Client now decides to remove the Spot Color so I add the "P" back in the name and change the color mode back to CMYK.

Now the break is;

C: 2.49%, M: 25.93%, Y: 100%, K: 0%

NOT

C: 0%, M: 29%, Y: 100%, K: 0%

This would cause some major problems on a flexo press...

Any Ideas????

Thanks,

Doug