[CentOS] Generating X.509 Certificates in Centos with open ssl

hi all

can someone please guide me to a good howto to Generating X.509
Certificates in centos 5.4 with open ssl?
i am using a windows based desktop virtualization software called
vWorkspace which requires (copy/paste from vWorkspace documentation)
      •   One or more X.509 web server certificates (depending upon
configuration)
      •   Trusted root certificate from the issuing CA installed into
the Windows  machine store of the SSL Gateway for certificates that
have been installed on Web Access or Connection Broker servers.
      •    Your certificate should have the same Issued To and Friendly
           Name.
      •    The certificate should be an RSA (1024) certificate, not an AES
           certificate.
      •    You should have a private key that corresponds to the certificate.

i need the certificate for testing purposes only, so i m using openssl
to generate a self signed certificate. i m not good enough with the
concepts either.
hence need sme help

thanks in advance
Arvind