To clarify: you need for the Podcast Episode box created by PowerPress to not appear in the WordPress editor for your Pages? Is that correct?
Disable actually. Not just hidden with css or jquery
I have asked the lead developer of PowerPress to look at your question. An answer will be posted here as soon as he’s had a chance to take a look.
If you can edit your wp-config.php, you can set a define of the exact list of post types the podcast episodes appear in.
Example 1, only ‘post’ post types:
Example 2 post and page post types:
define('POWERPRESS_POST_TYPES', 'post page');
This line needs to go into the wp-config.php somewhere in the middle, as long as it is above the include line near the bottom of the file you should be all set.
Did the defines work out for you?