ImageGlue 6 is a new version completely independent of the old. You can have both versions installed at the same time. When you want to take advantage of the new features simply reference the new name. For example in place of,

[VBScript]
Set mycanv = Server.CreateObject("ImageGlue5.Canvas")

simply use,

[VBScript]
Set mycanv = Server.CreateObject("ImageGlue6.Canvas")

Preferences for ImageGlue 5 and ImageGlue 6 are completely separate to allow you to have both installed at the same time.

The behavior of painting with patterns has altered slightly. If you want to paint with a pattern just set the Canvas.Pattern property and then paint. There is no longer a need to set the Canvas.PaintColor property to 'pattern'.