Tim,
The only way as far as I'm concerned is to do it the way you've described, especially if you're using a zoom lens.
Manfrotto have some intructions available by going to
www.bogenimaging.us/ Once at the website, select Manfrotto, then select "Heads...QTVR" then select any one of the QTVR heads "303" for example then once in, scroll down to the line "Click here to learn more about the exciting advantages of Pano / VR photography from Manfrotto's new site" (it is just above the specifications)
jules