For the people who have difficulties installing or running VMware player on Backtrack 5 R1, I hope this post will offer a solution for you.
First of all download the application from the official website.
Before installing make sure to:
(This is the current version when writing this post)
chmod +x VMware-Player-3.1.4-385536.i386.bundle
When you run it for the first time you may notice an error saying something about a module unable to install and refers you to an error log. My log said vmmod was failing to install.
The solution is to download this patch
And then run VMware player again. If everything went well it should work now. It did for me.
tar -xvf vmware2.6.39patchv3.tar.bz2
chmod +x patch-modules_2.6.39.sh