Dell XPS 15 (L502X), Ubuntu 11.04, cp: cannot create regular file `/usr/local/bin/' and other errors during installation

[pszafer]

Hope this issue wasn't here sooner. Anyway I didn't find any.
I have Dell XPS 15 (L502X), Ubuntu 11.04.

Specially for this, I made freshh installation of system.

During running installation (sudo sh install.sh) some errors come up:

cp: cannot create regular file /usr/local/bin/': No such file or directory cp: cannot create regular file/usr/local/bin/': No such file or directory
cp: cannot create regular file /usr/local/bin/': No such file or directory chmod: cannot access/usr/local/bin/bumblebee-bugreport': No such file or directory
chmod: cannot access /usr/local/bin/bumblebee-uninstall': No such file or directory chmod: cannot access/usr/local/bin/bumblebee-config': No such file or directory
chmod: cannot access /usr/local/bin/bumblebee-enablecard': No such file or directory chmod: cannot access/usr/local/bin/bumblebee-disablecard': No such file or directory
cp: cannot create regular file /usr/local/bin/optirun32': No such file or directory cp: cannot create regular file/usr/local/bin/optirun64': No such file or directory
chmod: cannot access `/usr/local/bin/optirun*': No such file or directory
./install.sh: line 481: wc: command not found
./install.sh: line 481: [: : integer expression expected
./install.sh: line 492: wc: command not found
./install.sh: line 492: [: : integer expression expected
./install.sh: line 499: /usr/bin/lspci: No such file or directory
./install.sh: line 499: cut: command not found
./install.sh: line 499: /usr/bin/lspci: No such file or directory
./install.sh: line 499: cut: command not found
./install.sh: line 499: cut: command not found
./install.sh: line 499: /usr/bin/lspci: No such file or directory
./install.sh: line 499: cut: command not found
./install.sh: line 499: cut: command not found
./install.sh: line 500: /usr/bin/lspci: No such file or directory
./install.sh: line 500: wc: command not found
./install.sh: line 500: [: -eq: unary operator expected
./install.sh: line 502: /usr/bin/lspci: No such file or directory
./install.sh: line 502: wc: command not found
./install.sh: line 502: [: -eq: unary operator expected

The BusID of the nVidia card can't be determined.
You must correct this manually in /etc/X11/xorg.conf.nvidia
Please report this problem..

Press Any Key to continue.

Unfortunately, when prompt "Press Any Key to continue." almost everything hangs up and Ubuntu hangs up, restarts etc. didn't work, I had have to manually uninstall everything or reinstall system.
I thinking that something is messed up with bashrc or sh because in few seconds I cannot execute any command in other terminal.

Am I doing something wrong?
Hope You can help me.

[MrMEEE]

GIANT BUG... causing /usr to be deleted... so sorry....