Not.. necessarily.
You decompile the framework-res.apk from this rom and go into res>values>bools.xml
Edit the line that says config_showNavigationBar and set it to say true, not false
NOTE: this is the part where I think it is fc'ing everything..
Open dimens.xml (same directory) and edit the line NavigationBarHeight and width (towards the top) to something that would work for our phones. The one that gave me the best results (looked like it belonged) was
38.0 and 32.0
Also note: decompiling/recompiling ICS apk's are VERY difficult. You're going to have to get past that of course
If you want to try mine out (what I have so far) download this apk:
http://www.mediafire.com/?fdly8614o4wk41y
Change permissions to 644, and reboot.
If you want to go back to the way it was before this framework edit, just simply make a backup before putting in, or you can wipe cache, dalvik and reflash the same rom. Nbd