I know most of the companies are using SharePoint 2010 and majority have migrated to it or planning to, but there are still a lot of clients still using and happy with the working of SharePoint 2007. Just like mine :).
So recently got a chance to configure the Info-Path on my clients site, the below are the steps to enable the Info-Path Forms Services.
It is quite simple to enable Info-Path Forms Services 2007 on your Microsoft Office SharePoint Portal 2007. Follow the steps below to use browser-enabled forms:
1. Go to the Central Administration
2. Click on Application Management
3. Click on Configure Info-Path Form Services under the Info-Path Forms Services section.
4. Make sure that browser-enabled form templates are allowed
(Check all check boxes in User Browser-Enabled Form Templates)
5. You can specify other options if necessary. Click on OK to apply the changes.
6. You can close the Central Administration Website.
I created a new Document Library on my site called ‘Info-Path Forms’. This document does not open Info-Path forms in your browser directly. You must configure this list in this way:
1. Open the List which contains browser-enabled Info-Path Forms
2. Click on Settings and select Document Library Settings
3. Select Advanced Settings Under ‘General Settings’
4. Configure the Browser-enabled Documents section and select ‘Display as a Web page’
5. Click on OK to confirm the changes
Publishing Info-Path Templates
Use the Publish Wizard to deploy the form on your Sharepoint Portal Server.
Define the location, promote the fields and publish!
(In this example you must update an existing Document Library)
Use following URL structure to deploy
Testing the deployed form
Create a new document in your ‘Info-Path Forms’ list. The form will be automatically open in your browser.
You can manage the toolbars at the top/bottom in Info-Path 2007.
(menu Tools > Form Options > Browser > ‘Show toolbar at top/bottom of form’)
Reference : Very Helpful Post