HELP on NERO Install in Linux!

Real Question:
How do you install a later version library required by a new tool (nero)
on your old version of linux ( uname -r 2.4.20-31.9 ) without breaking
the older programs.

Tried to install Nero
rpm -i nerolinux-3.0.0.0b-x86.rpm
error: Failed dependencies:
glib2 >= 2.4.7 is needed by nerolinux-3.0.0.0-1
gtk2 >= 2.4.10 is needed by nerolinux-3.0.0.0-1
libstdc++ >= 3.4.3 is needed by nerolinux-3.0.0.0-1

Queried library versions
64 rpm -q glib2 glib2-2.2.1-1
65 rpm -q gtk2 gtk2-2.2.1-4
66 rpm -q libstdc++ libstdc++-3.2.2-5

Downloaded the glib2-2.4.8 rpm libraries

Thought the "install option would keep the old version too"
rpm -i glib2-2.4.8-1.fc2.i386.rpm
warning: glib2-2.4.8-1.fc2.i386.rpm: V3 DSA signature: NOKEY, key ID 4f2a6fd2
file /usr/lib/libglib-2.0.so.0 from install of glib2-2.4.8-1.fc2 conflicts with file from package glib2-2.2.1-1
file /usr/lib/libgmodule-2.0.so.0 from install of glib2-2.4.8-1.fc2 conflicts with file from package glib2-2.2.1-1
file /usr/lib/libgobject-2.0.so.0 from install of glib2-2.4.8-1.fc2 conflicts with file from package glib2-2.2.1-1
file /usr/lib/libgthread-2.0.so.0 from install of glib2-2.4.8-1.fc2 conflicts with file from package glib2-2.2.1-1

Thought the "Update version would replace the old version"
rpm -U glib2-2.4.8-1.fc2.i386.rpm
warning: glib2-2.4.8-1.fc2.i386.rpm: V3 DSA signature: NOKEY, key ID 4f2a6fd2
error: Failed dependencies:
glib2 = 2.2.1 is needed by (installed) glib2-devel-2.2.1-1

Am I going down the right road? Reading the web about the dynamic libraries implied that I could install new ones without corrupting the old by using libexample.so.N.M etc... Do I need to setup these libraries and links by hand? or does an install script (rpm?) do that?