Reconfigures the wp_mail() function to send email using HTTPS (via Elasticemail) instead of SMTP and creates an options page to manage the settings.
No. WordPress 2.7 changed the way options were updated, so the options page will only work on 2.7 or later.
Short answer: maybe.
By all means please contact me to discuss features or options you'd like to see added to the plugin. I can't guarantee to add all of them, but I will consider all sensible requests. I can be contacted here: http://esideout.com/contact/