Many user dont like user interface of ubuntu this is a windows7 transformation pack for ubuntu.it would ubuntu look like windows 7 so you wont blame for ubuntu for having unfriendly interface.
This Package contains:
About the sounds, they can’t be installed, just you can replace the Ubuntu original sounds or configure you preferences sounds at System / Preferences /Sounds or copying at /usr/share/sounds (accessing as root) and save the folder there or replace the original sounds. (because of they have the same name).
source - Ubuntu Geek