How to include a python .egg library that is in a subdirectory (relative location)?

How do you import python .egg files that are stored in a relative location to the .py code?

For example,

My Application/
My Application/library1.egg
My Application/libs/library2.egg
My Application/test.py

How do you import and use library1 and library2 from within test.py, while leaving the .egg libraries in-place?