Dennis Lambert is not a name that rolls off of many people's tongues. He's been a real-estate agent for more than a decade in Boca Raton, Fla. But in a prior era, he was also a major songwriter and producer, directing Glen Campbell's "Rhinestone Cowboy" sessions, writing "Country Boy (You Got Your Feet In L.A.)" and the Oak Ridge Boys' "Dream On."

As it happens, Dennis' one solo album — an obscure early-'70s project titled Bags & Things — yielded a song that has become a Valentine's Day anthem in the Phillipines, and a dedicated radio personality tracked Dennis down to do a series of concerts there in 2007. A movie titled after that song, Of All The Things, documented the tour and it showed at the Nashville Film Festival yesterday for a crowd dotted with fellow songwriters.

The film, featuring pieces of now-classic pop hits Dennis wrote for such acts as the Four Tops, the Commodores, the Grass Roots, Starship, Tavares and Player, was directed by his son, Jody Lambert. It celebrated Dennis' relationship with his family (he once walked away from his attractive career to focus on his home life) and his reaffirming discovery of the lasting impression made with his behind-the-scenes talents.

Dennis certainly had the wisdom to help create a positive impression in the studio when he recorded "Rhinestone Cowboy." Glen, at the time, had evolved from a session musician into an entertainer and apparently hadn't planned on playing guitar on the album until Dennis suggested it.

"He agreed," Dennis remembered, "and he sat on a chair with the other guys and played the songs and cut the tracks, and [the musicians] loved that, havin' a star sitting there playing from his old days. Then when we went in to do all the vocals, he was astonishing, just was incredible. I'll never forget it. It was one of my very best and happiest experiences with any artist in my career."

That career might well be rejuvenated by Of All The Things. The film has gotten positive response at several film festivals, and he's reteamed with his former songwriting partner, Englishman Brian Potter, to work on a theatrical musical.

"Rhinestone Cowboy" songwriter Larry Weiss was among the songwriters who took in the movie during the Nashville Film Festival. Also in the audience were Beth Nielsen Chapman (whose credits include Faith Hill's "This Kiss"), Paul Craft (Mark Chesnutt's "Brother Jukebox"), James Slater (Martina McBride's "In My Daughter's Eyes") and Michael Omartian (Vince Gill's "When Love Finds You").