So either I suck at searching... or this question hasn't been asked in a while.
On my focus, a quick wireing job in place of the fuse swapped my low beams for my fogs as DRLs. Everything else was BAU for the fogs... the only difference was that they were DRLs for the fogs.
Is there anyway to do this on the 3?
For ref, this was the mod for the Focus:
http://www.focushacks.com/index.php?modid=12
2. Open fuse box and locate R13 according to the map on the fuse box cover
3. Pry, pull, or otherwise remove Relay #R13 from it's socket. It is in there tight but it comes out!
4. Cut a length of wire about 2 inches long. Strip the ends and crimp a spade lug to each end.
5. Push the lugs in to connect the two parallel sockets (not the 3 parallel ones).