Building same package twice and package forking

Hi all!

I'm creating LinuxFromScratch (http://www.linuxfromscratch.org) and its
projects (BeyondLinuxFromScratch, HardenedLinuxFromScratch,
Cross-LinuxFromScratch and BeyondCross-LinuxFromScratch) targets but I'm
having some problems in installing some packages.
Under the documentation I found the
How_To_Install_the_same_package_twice and the Package_Forking but I
haven't managed to make it works.
For the install the same package twice the examples are given using mine
and Build-Package.

In LFS we use to build same packages twice (example in stage0 and stage1
we use a Binutils-Pass 1, Gcc-Pass1, then some other packages, an
Adjusting the Toolchain phase and after some packages we have a
Gcc-Pass2 and Binutils-Pass2 and then the rest of packages).

My question is: can the package forking be used in conjunction with
Build-Target script to let  the automated-system-build take care of the
these double-passes (I meant, but I think it's understood, I need to
have these packages to build twice under the same stage but with two
different priorities);
Now then the question about package forking: I read in the
Package_Forking about the Conditional  .desc files and took a look at
the Desc_file_syntax. The examples show the conditions for the use with
$xpkg; so I would like to know if it's possible to use conditions with
the $target (example: one target has a x.x.0 version of a package, while
another target has the x.x.1 version of the same package) ?

Thanks in advance,
Yours,
Luca