That's not an issue, the 32-bit version runs just fine as long as the required 32-bit libs are installed. the 64-bit counterparts are also needed.
$ cat /etc/*release
CentOS release 4.3 (Final)
$ uname -a
Linux Aspire5000 2.6.17.7 #1 Tue Jul 25 11:26:01 EDT 2006 x86_64 x86_64 x86_64 GNU/Linux
$ rpm -qa --qf="%{n}-%{v}-%{r}.%{arch}.rpm\n" 'openoffice.org*' | sort
openoffice.org-base-2.0.3-7.i586.rpm
openoffice.org-calc-2.0.3-7.i586.rpm
<snip, you get the idea)
You may want to see this;
http://www.centos.org/modules/newbb/...=4504&forum=28