With different combinations of Perl and mod_perl versions, it can get confusing when installing mod_perl on Win32 via ppm in figuring out the right one to use. To help alleviate some of this, I've made up a script - mpinstall, accessible (soon) through the install docs in the Win32 OS specific sections of http://perl.apache.org/. This will take you through a dialogue, based on your configuration info, to determine and then install the appropriate mod_perl ppm package. It will also get and copy mod_perl.so to your relevant Apache modules directory - this is currently supposed to be done via a post-install script within ppm, but this functionality appears broken with ppm3.
If you try this, please let me know of any problems. -- best regards, randy kobes