I don't have that recording, so I don't know the exact answer. I do know that they played the Stereo MCs album Deep Down & Dirty before the concert. So it's probably two of the songs on that album.
Here's the tracklisting. Hopefully you can recognise the songs from their titles:
1. Deep Down And Dirty
2. We Belong In This World Together
3. Breeze
4. Running
5. Graffiti
6. Graffiti
7. Sofisticated
8. Traffic
9. Right Effect
10. Stop At Nothing
11. Unconscious
12. Shameless
13. Deliverance
Was one of em an instrumental only? I remember there was a toon i liked just prior to U2 coming on stage. It was like a slowish almost hip hop feel about it. Heard it since as background music on Documentaries