Crack This Code, Win RFT Sunglasses!

Edit note: Thanks everyone for playing. The code has been cracked, and it is none other than (what else?) a line from ZZ Top's, "Cheap Sunglasses."

She had a west coast strut that was as sweet as molasses,
but what really knocked me out were her cheap sunglasses.
Oh yeah.


Original contest below...

Last week's Riverfront Times feature story, Code Dead, examined the investigation into Ricky McCormick, a St. Louis man found dead with two coded messages on his body. The FBI believes the ciphers could reveal McCormick's killer(s), but the agency has been unable to crack the code in more than ten years of trying. 

As part of the story, expert cryptologist Elonka Dunin gave RFT readers a video tutorial on code cracking, using the term "Riverfront Times" as part of the answer key. Based on Dunin's key, what does the following message say?

First three readers to crack the code and email us the answer win a pair of these awesome RFT sunglasses! Good luck! 

PTF TRE R WFPQ VHRPQ PQLUQ QTRQ WRP RP PWFFQ RP DHCRPPFP.

IUQ WTRQ LFRCCY BGHVBFE DF HUQ WFLF TFL VTFRJ PUGNCRPPFP.

HT YFRT.

Editor's note: As has been pointed out, our code-cracker actually messed up her key slightly by forgetting the letter "A". Even so, the code is solvable if you use the key she provides. At 9:51 a.m. we already have one winner. Who's next?