If you were having trouble figuring out how Jose Guillen fit with the Giants, you're not alone. Fortunately, Mychael Urban is here to clear things up:
Guillen will likely start in RF, Huff to 1B
So, in sum:
Jose Guillen: Royals --> Giants RF
Aubrey Huff: RF --> 1B
Travis Ishikawa: 1B --> bench
It's worth pointing out that Ishikawa has actually outhit Guillen on the season, and that Guillen doesn't play good defense in the outfield, but anything can happen over a seven-week period.