How to install OpenJDK 1.7.0 on top of RHEL 5.8

Issue

• I tried to install the java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64 rpm and experienced several dependancies issues
• dependencies indicated by yum, which made me no problem :

    alsa-lib                  x86_64  1.0.17-1.el5                
    giflib                    x86_64  4.1.3-7.3.3.el5              
    jline                     noarch  0.9.94-0.9.el5_6            
    jpackage-utils            noarch  1.7.3-1jpp.3.el5            
    rhino                     noarch  1.7-0.7.r2.3.el5_6           
    tzdata-java               x86_64  2012j-1.el5                 

• a dependency unindicated by yum ca-certificate, which I solved with a non-RH package (I couldn't have it in RHEL repository : used Mozilla, as indicated)
• then a dependency which lead me to a long list of RHEL6 packages

    libpulse.so.0()(64bit) is needed by java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64 AND libpulse.so.0(PULSE_0)(64bit)

• So I used pulseaudio-libs-0.9.21-14.el6_3.x86_64.rpm, which made me use libasyncns-0.8-1.1.el6.x86_64.rpm, which made me use libsndfile-1.0.20-5.el6.x86_64.rpm, which made me use libvorbis-1.1.2-3.el5_7.6.x86_64.rpm and flac-1.2.1-6.1.el6.x86_64.rpm which made me use libogg-1.1.3-3.el5.x86_64.rpm, which needs a 2.7 version of GLIBC...
• So it doesn't seem to me I can install it on a RHEL5.8 with glibc 2.5.81 (other system dependencies about rpmlib showed as well, this is secondary point).
• And at last, I had those direct dependencies from openjdk packages (devel & base) which are the main point :

rpmlib(FileDigests) <= 4.6.0-1 is needed by java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64
rpmlib(PayloadIsXz) <= 5.2-1 is needed by java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64

• So how can I (at all?) install a 1.7.0 version of openJDK on a RHEL5.8?