Installation problems RH5 PostgreSQL 8.3.1

I'm trying to install PostgreSQL and the PostgreSQL libs on RHEL5
using rpms. I'm getting dependency problems:

>>>>># rpm --test -ivh postgresql-8.3.1-1PGDG.rhel4.x86_64.rpm postgresql-libs-8.3.1-1PGDG.rhel4.x86_64.rpm
warning: postgresql-8.3.1-1PGDG.rhel4.x86_64.rpm: Header V3 DSA
signature: NOKEY, key ID 442df0f8
error: Failed dependencies:
libcrypto.so.4()(64bit) is needed by postgresql-8.3.1-1PGDG.rhel4.x86_64
libreadline.so.4()(64bit) is needed by
postgresql-8.3.1-1PGDG.rhel4.x86_64
libssl.so.4()(64bit) is needed by postgresql-8.3.1-1PGDG.rhel4.x86_64
libcrypto.so.4()(64bit) is needed by
postgresql-libs-8.3.1-1PGDG.rhel4.x86_64
libssl.so.4()(64bit) is needed by
postgresql-libs-8.3.1-1PGDG.rhel4.x86_64

I don't understand the dependency on the so.4 libraries, since on
another server the 8.3.1 packages apparently use the so.6 libraries:

>>># ldd /usr/bin/postmaster
libxslt.so.1 => /usr/lib64/libxslt.so.1 (0x0000003ceb400000)
libxml2.so.2 => /usr/lib64/libxml2.so.2 (0x0000003cf0c00000)
libpam.so.0 => /lib64/libpam.so.0 (0x0000003cef800000)
libssl.so.6 => /lib64/libssl.so.6 (0x0000003cf0000000)
libcrypto.so.6 => /lib64/libcrypto.so.6 (0x0000003cedc00000)
libgssapi_krb5.so.2 => /usr/lib64/libgssapi_krb5.so.2
(0x0000003ceec00000)
libcrypt.so.1 => /lib64/libcrypt.so.1 (0x0000003cec400000)
libdl.so.2 => /lib64/libdl.so.2 (0x0000003cea000000)
libm.so.6 => /lib64/libm.so.6 (0x0000003cea800000)
libc.so.6 => /lib64/libc.so.6 (0x0000003ce9c00000)
libkrb5.so.3 => /usr/lib64/libkrb5.so.3 (0x0000003cef000000)
libcom_err.so.2 => /lib64/libcom_err.so.2 (0x0000003ced000000)
libz.so.1 => /usr/lib64/libz.so.1 (0x0000003ceb800000)
libaudit.so.0 => /lib64/libaudit.so.0 (0x0000003ced400000)
libk5crypto.so.3 => /usr/lib64/libk5crypto.so.3 (0x0000003cee400000)
libkrb5support.so.0 => /usr/lib64/libkrb5support.so.0
(0x0000003cee800000)
libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x0000003cef400000)
libresolv.so.2 => /lib64/libresolv.so.2 (0x0000003cecc00000)
/lib64/ld-linux-x86-64.so.2 (0x0000003ce9800000)
libselinux.so.1 => /lib64/libselinux.so.1 (0x0000003ceac00000)
libsepol.so.1 => /lib64/libsepol.so.1 (0x0000003ceb000000)

The so.4 libraries don't exist on either system!

Any help would be appreciated.

Cheers,

Cliff