EDWinXP library components consists of three parts-
Part, Package and Symbol.
Consider for example if I want to add a component LIQ to the EDWinXP Library.
Copy the files filename.part, filename.package, filename.symbol
to EDWinXP library, ie C:\EDWinXP\LIB\
Here copy the files LIQ.part, LIQ.package, LIQ.symbol to EDWinXP library.
For using the newly added component in Schematic or Layout editor we have to update the search sequence.
Update the search sequence for using the components
Steps for updating the Search Sequence
Open EDWinXP Library Explorer from Main Window.
Go to view option and select Search Sequence, a window appears.
Tick on the box alongside of the new added part, package and symbol.