Yes, It is possible to install the Pear Module in Windows server with PHP.
You need to install PEAR Package Manager, Go to the PHP directory on the server and look for go-pear.bat, go-pear.bat will ask you few questions,
go-pear.bat will install PEAR Package Manager.
Once you are copmplete witht the above, you need to update your PEAR installation; In order to do this browse
PEAR :: Installer :: Go-PEAR and save the output to a local file go-pear.php.
You can execute the file from command prompt :
Now you can install Pear Modules on server with command : pear install <Module_Name>