At the moment I am using Analogx proxy as Internet Connection Sharing tool
which is lovely and cool. I love it it is easy to set up and use. The only
problem is that it supports only 2 extra computers
I just had a look at the current version as I've not seen or used this
in a long time. I can't see where you are limited to 4 users - it is
after all a proxy server - anyone network computer that enters the
correct proxy details should be able to connect. I also note that
there's no apparent limit on email aliases - certainly not as low as
you suggest.
So first, particularly if you value the simplicity, you might recheck
whether the user limit you suggest is actually valid.
If you really find you need a more capable proxy your best bet might be
the 602 Software Lan Suite (see
http://www.software602.com/products/ls/) - this is still free for 5
users. But be warned, it is NOT as simple to set up as AnalogX and as
it includes a mail server, you MUST be super careful about security and
mail relaying. If you don't know about these aspects, make sure you
find out ASAP before trying to use the product.
But really, it's probably time you tried the internet sharing built
into Windows (ICS) - there are numerous guides on the net on how to set
this up and once set up it is much more versatile and effective than a
proxy based solution. And there are less security implications although
for any of these products you must be using a firewall.
See
http://www.practicallynetworked.com/sharing/ as a starting point
for this and other solutions.
And if you have a DSL connection you can consider one of the
modem/routers now available which will do the connection sharing thing
for you in one hit.
And lastly I do hope in the meantime you have AnalogX's security
setting correct (use the test button to check) - this program is widely
used by spammers as an avenue to hijack unsuspecting users.