Thanks Jim.

I have just looked at the authors home page, and found this:

Business::WorldPay::Junior
My perl module for those using the WorldPay Select Junior payment proc
+essing service.

The module provides a simple interface to track transactions and to ha
+ndle callbacks from WorldPay to verify the transaction has been autho
+rised and the right amount has been paid.

Full documentation is included with the distribution.

Do note that you must read the README file. The installation is a litt
+le more involved than just running make, make install as you often do
+ with Perl modules. The module is dependant upon MySQL and the DBD::m
+ysql module.

The distribution also contains a script to keep your installation up t
+o date with the WorldPay exchange rates. This script should be run ea
+ch evening to get the next days working rates.

There is a £ 25.00 charge for this software. After you pay the charge 
+you will be provided with a link from which you can download the late
+st version (1.05) of this module. To pay click here. Yes the process 
+does use the module to handle the payment.

The module is licensed under the terms of the GNU General Public Licen
+se. If you want to use this module in a software package that is not 
+compatible with the GPL license contact me to discuss alternative lic
+ensing arrangements.
[download]

Do you think we should be paying the £25, when it's version 1.0.7 that is on the CPAN?

I think we will e-mail him.
Gavin.