General :: Python Package Deployment Tool (Executable)

I am writing a python package deployment tool for linux based platforms. I have tried various existing tool sets but none of them is up to the mark and they have their own issues. Initially I'll start with simple approach.
1. Find all the modules/packages and copy to "lib" directory.
2. Find python's *.so dependencies (system libs) and copy them to "syslib"
3. Copy python (executable) and libpython2.6.so.1.0 into "dist" directory.
4. Set up temp environment
5. Run main script using "python <main script>.py"

The idea is to produce a cleaner directory structure. Neither I am creating a boot loader nor I am converting main script file into executable. It's plain vanilla stuff. Using above steps I have pulled down a package using wxPython's demo example "pySketch.py". You can download the archive from here: [URL]. After extracting the contents, run the executable file using "./run". This file sets temporary environment variables and execute "pySketch.py". This is eventually not working. I think I am not able to set up temporary environment properly or may be missing some other stuff.