When you run the install program, it will prompt you for a location to do the install or allow you to use the default. Where you put it is not really important, it will work where ever it is installed. There is even a doc file (in html) that will help you in configuring it for use with Apache (or is that configuring Apache for use with ActivePerl?). It does not have to be installed in the Apache directory tree at all.
I hope this helps.
I hope this helps.