Go to the layer properties in your attribute with the leading zeros.
Click on the display tab and then the Expression button.
Where there is the check box for Advanced click that.
Now write this in your dialog box. or copy paste if it works
Function FindLabel ( [TextTest] )
if instr(3, [TextTest] ,1) then
FindLabel = left( [TextTest] ,2) & mid( [TextTest] ,(instr(3,[TextTest] ,1)),10)
end if
End Function
Where it says [TextTest] change it to your attribute
Now this is important. The way it is in now it will only do it correctly for the strings that start with a 1 after the zeros.
Copy and paste everything from and including IF to End IF
change both of the 1 to 2 paste again for each number through 9 and change the 1 to the next number. make sure End Function stays at the end.
Where you see the 10 that is the number of characters after the zeros to display. If your string is longer than that increase the number.