Hello, I have been trying to install Wine for the past several hours. Please bear with me because this is only the second time I've used the terminal.

I downloaded Xcode for Snow Leopard, then MacPorts (which I can't find in the Application folder btw idk if it's supposed to be there). I went through and tried to install sudo port install wine when the necessary step came up but I got an error:

---> Attempting to fetch expat-2.1.0_0+universal.darwin_10.i386-ppc.tbz2 from http://macports.packages.ionic.de/expat
---> Fetching distfiles for expat
---> Verifying checksum(s) for expat
---> Extracting expat
---> Configuring expat
Error: org.macports.configure for port expat returned: configure failure: command execution failed
Please see the log file for port expat for details:
/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_expat/expat/main.log
To report a bug, follow the instructions in the guide:
http://guide.macports.org/#project.tickets
Error: Processing of port expat failed

I googled everywhere and decided to clean my ports since I read that I should clean usr/local. I couldn't find that so I ended up writing sudo port uninstall installed or something to that effect and it uninstalled EVERYTHING. I tried to reinstall wine, only to find that all my dependencies are uninstalled and it will not recompile. Every error, however, leads straight back to expat. I don't know how to fix it. Xcode seems correctly installed (version 4.2 for my Snow Leopard OS). Any help would be most appreciated. I'm trying to get LinkRealms to work.

Do what it says. This is a Macports issue, not a Wine issue.

First Macports is in /opt/local, NOT /usr/local

Next if you want to be able to see it in Finder, type
open /opt/local

To the error, see if expat installs without using the sudo command, after you port clean expat to start with. You may need to go learn more about macports, because as dimesio wrote, your issue is not Wine (yet)