Incredimail is a mail client, working on your computer, just like Outlook Express. It has, though, many more features than Outlook Express.
I have no personal experience, but many friends of mine use it.
The settings are pretty much the same as Outlook Express. However, VodaHost has setup a tutorial on how to set your Incredimail software. Have a look at
http://www.vodahost.com/vodatalk/ema...credimail.html
To see how to setup your email addresses (email accounts) in your VodaHost CP, look at
http://www.vodahost.com/demowolf/cpa..._popemail.html
The form setup is a totally different issue: have a look at
BlueVoda Forms Tutorial Part 1