php4 and php5 coexisting

[Geoff Speicher]

Does anyone have any experience with installing both mod_php4 and
mod_php5 on a server?  The packages conflict with each other, but it
should be possible to load both modules into Apache simultaneously and
then use .htaccess or file extension to control which version of PHP
gets used.

Is there any way to work around this conflict while at the same time
being able to enjoy the benefits of portupgrade and friends, or does
this require manual attention to detail?

Geoff