Scusa se insisto.
Per usare entrambe le architetture è meglio cambiare distribuzione.
Qui ti riporto una parte del wiki di Debian in materia:

5. Copy /etc/gtk-2.0/gdk-pixbuf.loaders to
/etc/gtk-2.0/gdk-pixbuf.loaders32, and replace all references to
/usr/lib/ with /usr/lib32/:

sed 's:/usr/lib/:/usr/lib32/:' < /etc/gtk-2.0/gdk-pixbuf.loaders > /etc/gtk-2.0/gdk-pixbuf.loaders32

acroread should work now.

6. To prevent the warning during the loading of the PPK module, remove it:

rm /usr/lib/Adobe/Acrobat7.0/Reader/intellinux/plug_ins/PPKLite.api

You cannot start any other program from Acrobat Reader (such as a web browser), because the special settings do not work for other applications. Hopefully someday this will all be easier.

----

Q: Does Wine work?

A: No, it seems like Wine has problems on recent kernels (especially 2.6.10), and it also has issues with 64-bit kernels. In theory, it should work. But it did not work for me.

...

Q: What about Flash?

A: Same story: It's a 32-bit binary, so you need a 32-bit system and a 32-bit browser. Personally, I do not want to lose the performance gain of a 64-bit browser only to be able to play anoying ads, but there may be better reasons to have Flash working that justify the tradeoff.

...

Q: How do I build i386 debs on amd64?

A: use the linux32 command to fake uname and limit memory size inside your i386 chroot. Package is linux32.

The following solution is based on the [https://alioth.debian.org/docman/vie....html#id274383 Debian-AMD64 Howto 'Running applications inside the chroot' Section]:

Simplest way to build i386 packages out of the box on amd64 is to use dchroot and a simple wrapper script
such as the following example for dpkg-buildpackage:

#!/bin/sh
rpath=`pwd`
dchroot -c i386 "cd $rpath && linux32 dpkg-buildpackage -ai386 $@"

Save it under /usr/local/bin/ia32-dpkg-buildpackage, make it executable and change the chroot name
according to your environment.

You will need to have your home directory available under the chroot.

Now you can build i386 packages using ia32-dpkg-buildpackage like dpkg-buildpackage. for example:

$ ia32-dpkg-buildpackage -rfakeroot

Remember to install the build-depends for the package inside the chroot.

Con Suse o Mandrake invece basta scaricare il sogrente e dare un bel ./configure, make e make install.
Bella differenza, vero?

mcz
P.S.: per quel che riguarda Flash è possibile farlo funzionare anche con Konqueror a 64 bit.
Le istruzioni su come fare si trovano sul Forum di Gentoo.
P.S.: una soluzione semplice può essere l'uso di un emulatore come QEMU su cui installi una distro a 32 bit.