I can't upgrade to PostgreSQL 7.4 in RedHat 9.0

Hello list

This is my situation:

My box: Pentium III, Red Hat 9.0

I was working fine with PostgreSQL 7.3.2.
Recently I decided to upgrade it to PostgreSQL 7.4 installing the twelve
rpms I downloaded from
ftp://ftp15.us.postgresql.org/binar...dhat/refhat-9/.

I followed the standar command to upgrade rpm packages but the installation
failed due to conflicts with the installed package unixODBC-devel-2.2.3-6.

This is the output I got from the system:
-------------------------------------------
#rpm -Uvh postgresql*7.4-0.5PGDG.i386.rpm
Preparing... ########################[100%]
file /usr/include/sqltypes.h from install of postgresql-devel-7.4-0.5PGDG
conflicts with file from package unixODBC-devel-2.2.3-6
----------------------------------------------

At first solution I tried to uninstall unixODBC (composed by two rpms:
unixODBC-2.2.3-06 and unixODBC-devel-2.2.3-6) but failed due to dependence
with the package libodbc++-0.2.2pre4-12 ( an ODBC class library that
emulates the JBBC interface). So, I change my mind because I fear to enter
in an endless upgrading.

My questions are:

a)What must I do to upgrade from PostgreSQL 7.3.2 I to PostgreSQL 7.4 in Red
Hat 9.0?.
b) If it is neccesary to upgrade the package unixODBC, where I can get the
rpm and what is the
correct version.?

I really hope someone can give me a hand.