newbie packaging question

I'm about to get a new dual opteron machine and move to Suse 9.1 Professional from Debian. The Suse will come pre-installed. I'm new to both smp and 64 bit, as well as Suse. I wonder if you could point me to some documentation that tells me which apps in the distribution are compiled as 64 bit - shall I need to compile them all myself, or are they all 64 bit? Will any 32 bit apps automatically be installed by a standard Suse install on that kind of machine? Ideally, with a completely clean machine, I'd like to try to keep the apps I use to 64 bit if it's possible (though I understand there will be 32 bit libraries) or is this just a pipe dream? Thanks. -- Richard Kimber http://www.psr.keele.ac.uk/