Multiple PHP installs with separate PEAR

I have two PHP installations PHP 5.2.17 and PHP 5.3.8 and I am wonderin开发者_如何转开发g how I would go about installing a separate PEAR installation for each version of PHP?

This is on windows and IIS.

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You need to use separate PEAR configuration files that you can specify with pear -C /path/to/config/file - one for each installation.