Better Than Wolves is a stand-alone mod found here: http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1272992-better-than-wolves-now-with-blunt-force-trauma

How to install the mod:
1. Download & Extract Better Than Wolves.
2. Open your Minecraft launcher and click New Profile.
3. Change the version to 1.5.2, name it BTW, and click Play at least once, then close the game and launcher.
4. Navigate to your .minecraft folder and open the versions folder.
5. Copy & Paste the 1.5.2 folder back into the versions folder, renaming it BTW.
6. Open the BTW folder and rename both of the files BTW.
7. Open BTW.json with a text editor and change 1.5.2 in the second line to BTW.
8. Close and open BTW.jar with an archive opener.
9. Delete the META-INF folder, then open the extracted Better Than Wolves mod.
10. Open the Minecraft-JAR folder and copy the contents to BTW.jar.
11. Close both and re-open the Minecraft launcher.
12. Click Edit Profile, and switch the version to BTW, then click Play.
13. Go to multiplayer after adding one of my groups to Hamachi and put the IP below into the Add Server text box.
14. Click that Join! button.
Refer to the wiki on the Better Than Wolves forums post for more help.

No, you can't be OP.
Also, no hacks allowed.

ID: betterthanwolves001-005
i.e. betterthanwolves003
Password: 123
IP: 25.6.219.3:25565