I received a long message in terminal but technically the problems are as follows:

checking for pthread_create in -lpthread... yes
checking for extra includes... no
checking for extra libs... no
checking for libz... -lz
checking for libpng... -lpng -lz -lm
checking for libjpeg6b... no
checking for libjpeg... no
configure: WARNING: libjpeg not found. disable JPEG support.
checking for Qt... configure: error: Qt (>= Qt 3.0.3) (headers and libraries) not found. Please check your installation!
For more details about this problem, look at the end of config.log.
[root@localhost k3b]# cd \

I looked for libjpeg on the 3 RedHat 9 discs and found the following files:
libjpeg-devel-6b-26.i386.rpm
libjpeg-6b-26.i386.rpm

The problem is that they're either installed or doesn't run properly (displays "Preparing System Update" and then disappears).

In http://www.ijg.org/ which is supposedly (?) the group that develops this, there are files under http://www.ijg.org/files/ but start with jpeg instead of lib. Are these the correct files to download? I checked the 3 RedHat 9 discs again and these files aren't there under RPMS.

For the Qt error, these files are found under the RedHat 9 discs under RPMS:
qt-ODBC-3.1.1-6.i386.rpm
qt2-Xt-2.3.1-13.i386.rpm
qt2-devel-2.3.1-13.i386.rpm
qt2-designer-2.3.1-13.i386.rpm
qt2-static-2.3.1-13.i386.rpm

Again, they either only display "Preparing System Update" then closes prematurely or are already installed.

What am I doing wrong?

rpm is very closemouthed about its error[condition]s.

Try man rpm. If I remember correctly, you can specify options -v (verbose) but certainly -qa (query all?). So try rpm -qa | grep Qt* to find out what Trolltech-software is installed -- as opposed to what is on your discs. Same for libjpeg*

I downloaded the software off the Trolltech site. Here's what happened:

checking for libpng... -lpng -lz -lm
checking for libjpeg6b... no
checking for libjpeg... no
configure: WARNING: libjpeg not found. disable JPEG support.
checking for Qt... configure: error: Qt (>= Qt 3.0.3) (headers and libraries) not found. Please check your installation!
For more details about this problem, look at the end of config.log.
[root@localhost k3b]# rpm -qa | grep qt
qtcups-2.0-15
qt-3.1.1-6
[root@localhost k3b]#

Fine. Which version, and what exact name? Did you install it without any errors? You don't say...

Well, did you? What's it say?
Yeah, sure.
Qt, Linux is case sensitive...

you need qt-devel installed