Minecraft – n online storage option that can connect with Computercraft

I think that the best bet would be to figure out your port forwarding issue by asking about it on Superuser.com. Then set up the server at your house and just run MineCraft from school.

Almost all VPN clients need to create a virtual adapter to create the tunnel. This will require you to have Admin rights on the machine that you want to install the client on. Based on what you have said that is not possible.

Do you have access to the router where you live to try and properly configure the port forwarding? Also are you setting up a standard MineCraft server or using something like Bukkit?

The generic way in Windows 7 (and 8) to the question "how do I tell this application to put its files somewhere else" is to use a junction.

A junction is somewhere between a hard link and a symbolic link (or a shortcut in windows). Creating a junction in place of where you expect the directory to normally go will instead redirect the files sent to that directory to somewhere else.

In this case, we want to create a junction from the usual minecraft directory of %appdata%/.minecraft to a flash drive that is mounted (for example) as E:

To do this, open the run dialog (WINKEY + R) and type

mklink /j %appdata%\.minecraft E:\minecraft

(Make sure the original minecraft directory doesn't exist first).

Now when you run the applet, it will place the files in E:\minecraft.