Ok needed to get going on actually installing the Eagle 6.4 on my Fedora 18 machine.
Firstly after the install comes the substantial number of updates (Get these or be forever a Slacker!! )
Imediately I have a couple of problems here, firstly the Linux version is really new and liibs are equally so,
secondly I'm installing this 32 bit application on my 64 bit system, so not only do I need a set of support libraries
but also the 32 bit versions. Fortunately these all exist and some of this as all been done before like here,
thing to note that many sites refer to i386 packages because they are simply old, but no one has really
done i386 optimised packages in yonks so look for their i686 equivelents and you'll be fine !
yum install expat*686
yum install fontconfig*686
yum install glib*686
yum install libX11*686
yum install libXau*686
yum install libXcursor*686
yum install libXdmcp*686
yum install libXext*686
yum install libXfixes*686
yum install libXft*686
yum install libXi*686
yum install libXrandr*686
yum install libXrender*686
yum install libgcc*686
yum install libjpeg-turbo.i686
yum install libpng.i686
yum install libstdc++.i686
yum install libxcb.i686
yum install zlib.i686
Install these and you are well on your way (yes it also installs a few dev libs but we won't worry about that !)
Now upon running the installer I found my next little nugget, rather than binding the eagle binary to the
version independent libraries some were infact specific versions naughty and anoying as I'm sure they would never consider
doing this on Windows to a DLL! Any way the solution is very simple merely symbolic Link the current libraries to files representing
the old versions Eagle was expecting (Since I was going back and only a version or two I felt confident to do this!!).
If you ever find yourself in this position used the command "ldd" to dump the libraries that an executable has been compiled with
user1@localhost bin]$ ldd eagle
linux-gate.so.1 => (0xf773f000)
libXrender.so.1 => /lib/libXrender.so.1 (0xf770b000)
libXrandr.so.2 => /lib/libXrandr.so.2 (0xf7700000)
libXcursor.so.1 => /lib/libXcursor.so.1 (0xf76f5000)
libfreetype.so.6 => /lib/libfreetype.so.6 (0xf7655000)
libfontconfig.so.1 => /lib/libfontconfig.so.1 (0xf761b000)
libXext.so.6 => /lib/libXext.so.6 (0xf7609000)
libX11.so.6 => /lib/libX11.so.6 (0xf74d1000)
libdl.so.2 => /lib/libdl.so.2 (0x49ea2000)
libXi.so.6 => /lib/libXi.so.6 (0xf74c1000)
libpthread.so.0 => /lib/libpthread.so.0 (0x49ea9000)
librt.so.1 => /lib/librt.so.1 (0x49fcf000)
libssl.so.1.0.0 => /lib/libssl.so.1.0.0 (0xf7461000)
libcrypto.so.1.0.0 => /lib/libcrypto.so.1.0.0 (0xf72b8000)
libstdc++.so.6 => /lib/libstdc++.so.6 (0xf71ce000)
libm.so.6 => /lib/libm.so.6 (0xf718e000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xf7170000)
libc.so.6 => /lib/libc.so.6 (0x49cea000)
/lib/ld-linux.so.2 (0x49cc7000)
libz.so.1 => /lib/libz.so.1 (0x49ec5000)
libXfixes.so.3 => /lib/libXfixes.so.3 (0xf7169000)
libexpat.so.1 => /lib/libexpat.so.1 (0xf7140000)
libxcb.so.1 => /lib/libxcb.so.1 (0xf711e000)
libgssapi_krb5.so.2 => /lib/libgssapi_krb5.so.2 (0xf70db000)
libkrb5.so.3 => /lib/libkrb5.so.3 (0xf6ffb000)
libcom_err.so.2 => /lib/libcom_err.so.2 (0xf6ff6000)
libk5crypto.so.3 => /lib/libk5crypto.so.3 (0xf6fca000)
libresolv.so.2 => /lib/libresolv.so.2 (0x4a13a000)
libXau.so.6 => /lib/libXau.so.6 (0xf6fc5000)
libkrb5support.so.0 => /lib/libkrb5support.so.0 (0xf6fb9000)
libkeyutils.so.1 => /lib/libkeyutils.so.1 (0xf6fb4000)
libselinux.so.1 => /lib/libselinux.so.1 (0x49ede000)
libpcre.so.1 => /lib/libpcre.so.1 (0x49f0c000)
Check the versions you have installed and painstakingly get the right ones or take a chance on making a llink to the current version
(lie, lie again and keep liying 
)
Anyway after that Eagle pops up with no further touble so it was a very useful hour or so sorting it all out, hope this helps other folks
or at least gives them ideas on how to proceed.
Finally here's my Eagle Cad Proof of life Photo:
