Networking :: Wireless USB Adapter(ZEW2501)

I have a USB wireless adapter and I dont know how to install the driver. I know a little bit of C and C++ and on the CD that it came with is some linux files. The file is zd1211-4715.tar.gz and theres a readme. I need the intructions to be a little more detailed. Like type the command into what? Wheres the makefile? Is it in the .tar.gz file? Thanks for the help.

1) untar the package using the command:
tar zxvf zd1211-XXXX.tar.gz

2) edit the Makefile to make sure the path of KERNEL_SOURCE is your
are running, and the kernel version is correctly configure.

3) Under zd1211-XXXX/zdsta directory, use "make clean", "make", "make install"
to make and install driver.

original here.