First thing I noticed when looking at the output posted in reply #4: You extracted all three packets at the wrong location.
Steps to take for 5.5 GCC 4.1 pass 1:
cd /mnt/lfs/sources (all packages/patches should be here)
tar jxf gcc-4.4.1.tar.bz2
tar -jxf ../mpfr-2.4.1.tar.bz2 (here both mpfr and gmp are unpacked)
mv -v mpfr-2.4.1 mpfr
tar -jxf ../gmp-4.3.1.tar.bz2
mv -v gmp-4.3.1 gmp
mkdir -v ../gcc-build (create and enter temp build directory)
You are now standing in the temporary build dir and can continue with the next step (configure).
I also see that you use CentOS as a base system, I hope you did check (and corrected if needed) this: iv. Host System Requirements
. It is very important that these are correct/up to specs.
Jope this helps.