I've been trying to change the default white font used in WPI when you create a list of applications, is this possible? How can it be done?

Find the wpi.css file of whatever theme you are using (i.e. %wpipath%\Themes\Glossy\wpi.css). Edit the file with a text viewer and look for a section that begins with .txt, change the color value.

.txt
{
	font-family: arial;
	font-weight: bold;
	color: #FFFFFF;	   <----------CHANGE this value the the html hex code of the color you would like
	font-size: 8pt;
	margin-left: 5px;
	margin-right: 10px;
}

HTML color codes

Thanks zorphnog, I'll give that a go.