David
Dexterity is a full development environment which needs developer skills to use. Modifier is much simpler and may be able to achieve what you want easier.
Please describe what changes you would like to make so we can assess if this is best achieved with Modifier or Dexterity.
In the meantime, this "Choosing a Development Tool" article might help you.
http://blogs.msdn.com/developingfordynamicsgp/archive/2008/08/11/choosing-a-development-tool.aspx
David Musgrave [MSFT]
Escalation Engineer - Microsoft Dynamics GP
Microsoft Dynamics Support - Asia Pacific
Microsoft Dynamics (formerly Microsoft Business Solutions)
http://www.microsoft.com/Dynamics
mailto:David.Musgrave@online.microsoft.com
http://blogs.msdn.com/DevelopingForDynamicsGP
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