Is there a way of getting customer to agree to terms & conditions before ordering or paying for goods?

One way would be to use a custom order field in the order page with a check box.
" Administration > Order Profile Page > Custom Order Fields"
The customer must check the box to proceed ("Field Required").
 
I would suggest you use the html settings on the field to include a a "details" or similar link on the page. This then uses javascript to open a popup window with the terms and conditions if the customer clicks on it.
 
This way if they havn't read the T&C before they don't have to navigate out of the order process to do so.
 
HTH

Only just got back to this.
Just pasted the following into Field Name:
 
<a target="_blank" href="http://www.mydomainname.com/terms">Agree to terms & conditions</a>
 
Works great.
 
Thanks

I want this to be added in the system as well as it is in support and other functions. The problem with the above mentioned solution is that the code is shown on the invoice..