most Texas Editions, like mine, have the 4.6 and won't have any real issues with the spark plugs. It was a 5.4 issue and has been, as some of the actual Ford employees around here have stated, addressed.
All you should do is to take care to A) don't be too rough with the COP's and B) make sure not to knock anything off into the cylinder chambers.
Mind you, there ARE some TE's running around with 5.4's and all you really need to do is just look under the hood. Is the air-cleaner ON the engine or by the drivers side fender? By the fender? 4.6 On the engine? 5.4
Hope this helps!
D