Joy--congrats on all the full requests! Here's crossing fingers for you.
king--I've never had a full request that didn't specify how they wanted it. Most say Word or .doc attachments. One agent takes equeries but wants the full mailed to her. If the agent doesn't say, assume they want an attachment.
Kidd--My advice? If the thought of revising makes you cringe, don't. That's kind of my philosophy. Unless you have an agent or editor who thinks it's a great premise and wants revisions, you have no guarantee anyone is going to want the book when you're done with it. So why not move on to a project you're excited about? You can always come back to this one when you're feeling like it. Life is too short and getting published is too uncertain to waste time working on projects if you're not enjoying them.
But on to the other half of your question, which is how to Show vs. Tell...
Gail Carson Levine has some good stuff about that in her book, Writing Magic.
I think it's actually pretty easy to show things, if you focus on a few ideas:
#1: Sensory detail. The more you get into your character's perceptions in the moment, the more a scene feels real. If your character is in a creepy place, show me the creepy things she sees/hears/touches/smells, and I will figure out the creepiness for myself. A few perfect sensory details can really set the mood. Just be very careful that your sensory details don't become cliche ones--we can only have so many pounding hearts before we lose the mood.
#2: Be very faithful to the order of events as they actually happen. Cause and effect. Action and reaction. Or, even better, action, emotional reaction, next action. So if one character says something that makes another character angry, don't waste words telling me how mad it made you, and don't talk about something else before showing me your character's response. Instead, show me one of two things: 1) Your character's sharp response, in words, or 2) Your character's struggle to control the sharp response and not let it come out, followed by whatever they come up with as an alternative. Either of those lets me feel the emotion for myself.
I try to remind myself that characters reveal themselves in everything they say and everything they do. I don't think JKR ever once tells us, in her narration, that Harry Potter is a good/honest/honorable/intelligent person. His actions speak for themselves. I think that's a key part of showing--creating a character whose words and actions are clear and distinct enough to speak for themselves, so the narrator doesn't have to.