hi there,
It is possible to copy the LFS partition.
Did it myself with a version of lfs build on a P4 and copied it to a athlon pc (different cpu, and everything
).
Just make sure that when you copy it, the new pc will not boot until you make a new kernel for that pc (copy it and boot it using a suse rescue cd or something alike and make the kernel), after that it runs just fine.
Just make sure you haven't used any compile optimizations!