Here is a piece of requirement of my customer,

Customer:Is there anyway it can carry on looking at the Open folder once it has processed the initial pdfs?
Me:You want batch readerenable monitor the open folder to automatically convert the pdf, right?
Customer:Yes that is right.
…
Customer:Can I confirm that this is for full automation of the reader enabler application. We would like to be able to select the Open folder and also the Save Folder, also once the pdf’s have been processed can they be moved out of the Open folder? So all that we will be left with is a pdf that has been changed on the Save folder?

And now I have developed my new product, Dirmonitor.
Dirmonitor execute an action when a file is modified, for example, execute command line version readerenable when a file created.

Just finish a little application, PDFResize(aka PDFScale), it is an application that can easily resize/scale your pdf with new size, for example, resize a A4 PDF to A3, or resize a A3 PDF to A4.
The first version will be a command line application.

Many customers feed backed that readerenable and usageright enable do not work well on vista, and I just install vista this week, so I have chance to figure out the reason.

Windows Vista has the built-in ability to automatically reduce the potential of security breeches in the system. It does that by automatically enabling a feature called User Account Control (or UAC for short). The UAC forces users that are part of the local administrators group to run like they were regular users with no administrative privileges.

So we just need disable UAC.
Here is a easy way to disable UAC, just save the following code to dos batch file and execute it

C:\Windows\System32\cmd.exe /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f

If you want to enable UAC again, please try

C:\Windows\System32\cmd.exe /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 1 /f