Play any maplestory the shorter version (Vista)

Create a new VPN connection (Start > Network > Network and Sharing Center > Set up a connection or network > Connect to a workplace > Use my Internet Connection (VPN)).
Now visit Hotspot Shield for iPhone - this is where you will get the required connection information.
Click the giant Get Account ID button.

Server: 64.55.144.10
Account: abc123 (I'm pretending abc123 is mine - yours will be unique)
Password: abc123 (ditto as above)
Secret: password
Enter 64.55.144.10 for the Internet Address. For Destination Name, put whatever you want. I put HotspotShield. Be sure that Don't connect now; just set it up so I can connect later is ticked, because we need to change some advanced settings later.

For username and password, enter what you were given by the Hotspot Shield website. Tick Remember this password. You don't need anything for Domain. Close the window when you finish.
Now go to Start > Connect To. Right click on the connection you created and choose Properties.
On the Networking tab, change Type of VPN to L2TP IPsec VPN and then click IPsec Settings.

Choose the Use preshared key for authentication option and type in password for the Key (this is what the iPhone calls Secret).