[Puzzle Giveaway] - Easy!! :) THREE HOURS LEFT

Hey guys!

Giveaway starts at 2PM EST, and lasts for a week. Have fun!! The game is Binding of Isaac.

http://www.steamgifts.com/giveaway/XxxxX

First letter of every answer, alright??

1) Command switch you can append to java.exe, to define minimum/maximum RAM.

2) "It is nothing so trivial as revenge. A fight to the death with you. Only in that can my soul find respite. I will you or you will me... it makes no difference."

3) Linux/Unix command to export an environment variable.

4) If I want to share files on my Windows Server, I would most likely use this protocol.

5) This letter is somewhere. A place that belongs to me. When you see it you'll know.

Alternative question for #5: In Chapter 6 of Lewis Carroll's second most well known book, he explicitly defines a certain nursery rhyme character as being this type of object.