I just love that numpty "easy share" bolocks that Windows purports to offer.
Disable simple file sharing, make sure that all users have to enter a password to logon to windows, and then share it out.
The only difference (over the so called network wizard) being that when prompted for the username/password of the drive you want to access, you simply enter the user credentials of the box you have the hard drive attached to.
If you don't want it that difficult, then use the standard Administrator share account (the command line being \\IP ADDRESS (of machine that has hard drive) \SHARE NAME (or IP address) and press enter.
For example. \\192.168.1.50\E$
In the above example, we assume your machine has an IP address of 192.168.1.50.....and the hard drive you want to access is connected to a machine that has an IP address of 192.168.1.50
The $ variable simply indicates you want to access the default admin share.
Please note....the above example only works on XP Pro, and Vista Ultimate.
Any other version of the specified OS and it will not work.
The reason it doesn't work on any other version is because MS have decided (rightly in most cases) that the end user needs protecting from themselves.