Good morning,
This is what I assumed. When I tried it worked for me but php_openssl would no longer show up in phpinfo.
I think the best way for you to move forward is to use mod_fcgid. It will allow you to run any PHP that the computer will run. It also runs PHP is separate processes, not in Apache's process. So if PHP crashes, because of this separation, Apache will not go down with it.
Also with mod_fcgid, you could run Apache 2.4 64bit and still keep your PHP 5.2 32bit. You can also run more than one version of PHP. Keep 5.2.17 just for the forum and use something newer for the rest of the sites, ever.
I have not experimented with just how fine grained mod_fcgid will allow, but it is enough to use different PHPs per vhost.