On PMs... Remove Default Save Copy

[Diva]

Is there a way to turn off the save copy of sent message and tracking option?

Most of my users don't use those options and even forget that they are there. Many have complained that it fills up their space and is unnecessary.

Is this possible?

Also, is there a way to remove the "http://" in the link pop up box. I have had to fix many entries simply because the user didn't realize it posted before their link.

Thanks bunches!