I don't have immediate access to the orbital parameters for this mission. The past missions (unmanned test flights) were launched into 41-42 degree inclinations. This is too low an inclination to be reached by a Progress (minimum for them is about 51 degrees).

According to this article, the orbital module apparently has the ability to maneuver on its own.

A module left in orbit from China's unpiloted Shenzhou 3 has made significant maneuvers, suggesting that the hardware might be utilized for test purposes later this year. Shakeouts of equipment in space and practice runs by ground controllers are a prelude to China's entry in the human spaceflight arena.

The automated Shenzhou 3 spacecraft -- comprised of multiple segments -- was rocketed into orbit March 25 atop China's Long March 2F rocket. On April 1, the Shenzhou 3's return module parachuted to Earth. The spacecraft's orbital module, however, was left behind in space, later making minor adjustments to its orbit.

Following nearly a month of circling Earth, and using onboard steering jets, the Shenzhou 3 segment zoomed to a much higher orbit last week. This maneuver could set the stage for a test of rendezvous procedures helpful in building up confidence and capability in China's bid to fly its own crew, and also to construct and house a space station.

The manuevering capability of the orbital module was also reported here.

There is at least some speculation that the orbital module may be carrying a high resolution camera. The past maneuvers indicate the orbital module has adequate propulsion, attitude control, and electrical resources to support such a mission.