Copying the binaries to a tarball won't do you much good, you need do follow pretty much the entire "tutorial".
After I've build my version of XBMC I've copied the contents of /opt/xbmc-bcm to the same folder on my debian6 image on a SD card. Boots a lot faster and doesn't depend on my ubuntu pc anymore.
I'm now compiling XBMC with Alsa support (since I want to use my external soundcard with optical out) and OpenELEC.tv at the moment. Stresstest anyone?
If you don't got a linuxpc you can just download a Ubuntu Desktop iso, and install it to a file/folder on your windows pc and dualboot into it. The thrill of compiling your own version of XBMC is just priceless!