Not sure if it will work for you – but – this worked fine for me:

for file in 
	gmp-4.1.4-10.el5.x86_64.rpm 
	readline-5.1-3.el5.x86_64.rpm 
	python-2.4.3-27.el5.x86_64.rpm 
	libxml2-2.6.26-2.1.2.8.x86_64.rpm 
	libxml2-python-2.6.26-2.1.2.8.x86_64.rpm 
	expat-1.95.8-8.3.el5_4.2.x86_64.rpm 
	python-elementtree-1.2.6-5.x86_64.rpm 
	sqlite-3.3.6-5.x86_64.rpm 
	python-sqlite-1.1.7-1.2.1.x86_64.rpm 
	elfutils-0.137-3.el5.x86_64.rpm 
	popt-1.10.2.3-18.el5.x86_64.rpm 
	m2crypto-0.16-6.el5.6.x86_64.rpm 
	rpm-4.4.2.3-18.el5.x86_64.rpm 
	rpm-libs-4.4.2.3-18.el5.x86_64.rpm 
	rpm-python-4.4.2.3-18.el5.x86_64.rpm 
	m2crypto-0.16-6.el5.6.x86_64.rp 
	python-urlgrabber-3.1.0-5.el5.noarch.rpm 
	python-iniparse-0.2.3-4.el5.noarch.rpm 
	yum-fastestmirror-1.1.16-14.el5.centos.1.noarch.rpm 
	yum-metadata-parser-1.1.2-3.el5.centos.x86_64.rpm 
	yum-3.2.22-26.el5.centos.noarch.rpm
  do rpm -Uvh --nodeps http://mirror.centos.org/centos-5/5.5/os/x86_64/CentOS/$file;
done