InfoPath Dev

I'm very new to InfoPath having just migrated from Access VBA!
I'm currently working on an enterprise project using InfoPath. The company in question has not implemented SP1 or SP2.

My question is, if I upgrade my PC Client to SP2, will any forms I create run on earlier versions of InfoPath. I particularly want to use SP2's rules and conditions.

Please forgive me if this question has been asked before, I have conducted a search but not come up with anything so far (unless i didn't ask the right question ;-) )

The new forms you design can be run by users who have the service pack features enabled on their computers.

http://office.microsoft.com/en-ca/assistance/HP011065361033.aspx

Ok many thanks.. back to the drawing board i guess ;-)

You can use SP2 to design non-SP compatible forms, however you can't use the new features since the older clients just don't have those features. Sorry for the bad news.