After releasing InfoPath 2003 SP1.There is lots of changes on it. The good thing is that you can disabled and enabled the SP 1 option using following things.

Enable or disable service pack features

The Microsoft Office InfoPath 2003 Service Pack improves the way you work with InfoPath by allowing you to add filters, rules, and other useful features to your forms. You can also insert new types of controls, such as file attachment controls and master/detail controls, and create formulas without writing script.

To use these features when you design or fill out a form, you must enable the service pack features for your installation of InfoPath.

Note  If you enable service pack features, the new forms you design can be filled out only by users who have the service pack features enabled on their computers.

1. On the Tools menu, click Options, and then click the Advanced tab.
2. Do one of the following:
   • To enable service pack features, clear the Disable Service Pack features check box.
   • To disable service pack features, select the Disable Service Pack features check box.

   Note  If you do not see the Disable Service Pack features check box, then you have not installed the service pack for InfoPath.

3. Restart InfoPath.

Thanks and Regards,

Suresh [Microsoft MVP .Net,India]

NOTE: I tryed to copy the picture from print screen but failed ,i will try some other time and show it to you ,So shame to me .... :(  or check my other weblogs http://picturefromsuresh.bloger.com/  :)