To have a standard entered into a Shade Library without the process of remeasuring, copy the current standard (click on Edit, then Copy, then Standard.)
From the Options menu Select the Shade Library Mode.
Select the Library you wish to add to by clicking on the blue hyperlink for Shade Library and select the Library you wish to use.
Then from the Instrument Menu, select Measure Trial, and a pop up will appear. Near the bottom a button will appear that says "Paste". Click on this button and it will paste the standard data you placed on the clipboard into the trial field.
From here you may then select to enter the formula by manual entry or by auto formula. With the formula information entered, click on save to add this color to the shade library.