Use bfgminer 3.10  Works the best! Also, to bump each of those past 2.2 GH/s each, you'll need to solder in a 10k and 2.49k or 3.74k 603 type resistors in the R1 and R2 slots as seen here in the AntMiner U1 User Guide: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CCYQFjAA&url=https%3A%2F%2Fraw2.github.com%2FAntMiner%2FAntGen1%2Fmaster%2Fmanual%2FAntMiner-U1%2520user%2520guide.pdf&ei=Ntz6UqaUAsH30gGloIHwCQ&usg=AFQjCNHyBa6WMwUpIpV_aHdL27m5KxKn1g&bvm=bv.61190604,d.dmQ

The power supply should be adequate so no problems there.  There is definitely going to be soldering involved though so you'll need a very fine soldering iron tip, a very powerful magnifying glass, and some very delicate tweezers...