HA!! I just did this this AM. I have a 2001 Sport, but I am guessing Ford is using parts from the same bin.
My factory fogs took 9045 bulbs which I guess are high beam bulbs specially designed to work in Ford foglights via the utilization of a black tip on the bulb which reduces the glare on oncoming drivers. A 9005 bulb will replace the 9045. The difference is the 9005 doesn't have the black tip and therefore is much brighter than the 9045. Oh, and the 1 of the 3 locating tabs on the bulb is slightly different.
When you hold the bulbs so the element is pointing towards you, the tab on the lower right side of the 9005 is a bit lower than its counterpart on the 9045. Don't worry, the difference is nothing 5 minutes of filing with a nail file and Exacto blade won't fix. Believe me, I thought twice, or maybe 4 times about whether I wanted to cut into my $70 PIAA SuperWhites, but really, there is nothing to it. Do it slowly and leave the Dremel in its case. This isn't the place for vibration.
I was much happier with the perfomance of the PIAA 9005s as compared to the 9007s in the headlights. The PIAA box says "100/110 power" but I doubt that.