How to update the library with out affecting routing in Pads 2005 ??

Version 1
    Click to view larger image

    Hi everyone, good morning,i have the queries about updated library that means i updated drill and pad size i don't want do it ECO method.instead of i export the part library ascii file (.p) format. after that i imported in my design.but it not importing .or else any one explain about procedure for updated library to be update in board file