It is in Packs A Wallop - page 39. Thinking about Brian's question I just started playing around with it this afternoon. Lorayne even says that the Royal Flush ending is a bit illogical, so I messed around a little and split it into two different, but cohesive tricks.
Perform the first phase as written with one exception. Put any available four of a kind under the 5 card stack on top. Cut and hold a break at the 9 card stack. Spread the cards, passing the break and 5 below it and classic force any one of the 4 of a kind (based on R.P.Wilson trick). Cut at break and return stack (minus selection) to top of pack. Perform 6 Card Royal as written in Wallop, but do not show the Royal Flush Kicker. Place their selection back on top of deck (returning it to it's 4 of a kind).
Cut the deck from the back at the middle or so. Slide in the unrevealed Royal Flush and hold a break above it. Cut at the break and perform an out-faro. False shuffle or cut as desired. Deal two five card poker hands. Spectator receives four of a kind with their selection, magician receives a royal flush.
Patter/ scripting should be fairly obvious. Spectator has affinity towards chosen card in first trick. Affinity continues in second trick, but magician tops spectator's luck. Would probably end it with my favorite variation on line "I'd rather be lucky than good." My variation is "I've heard that it's better to be lucky than good." (Turn over 4 of a kind) "But I've found being good has it's own benefits." (Turn over Royal Flush)
Worth what you paid for it.