How to change text on signup page and send email with welcome message?

Hi There, I just installed Remove Email Verification plugin and need help with setting it up. Two I think small issues:

1 - on signup page still say "We send your registration email to this address. (Double-check your email address before continuing.)" - How to change this to "In the next step we'll create your password. (Double-check your email address before continuing.)". Then on the page with password created, how to change text "You can now update your details by Logging in to your account or go back to the homepage."?

2 - Can I still send email with password to supplied email address? Just email that would say "Welcome, thank you for joining, here is your password and user name..." Is there a plugin for this? Something like welcome email?

Thanks a lot.
Regards, Dean