2
Not sure on 3, but for 1 and 2...
1) To remove the "approve" checkbox, you'd have to hack the module; that is, modify the php files that the module runs on. If you don't have PHP experience, I strongly do not recommend this route. Instead, try turning on Auto-Approve in the module's preferences. It should be entitled "Auto approve news stories without admin intervention?". Set this to "Yes" and news stories will be published without the need of an administrator's approval.
2) Once again, to remove these checkboxes, you'd have to hack the module. If these are left alone (the checkbox is not checked), then it should publish immedietly with no expiration.
I hope this information helps. Good luck with your site!
-zimmi88 =)
"Need coffee, keep away..."