Is it possible to load a .zip or .jar file and read the contents and then load the contents into the IDE for execution ?

For example:
If I make a .zip file for openprocessing.org can I write a sketch that reads the zip file, extracts only the pde and .jar files.
Read the .jar file to extract the embedded images and then copy to a folder of the same name of the pde file and then execute it in the IDE ?

I want to build a sketch loader of sorts but from .zip files.