Thanks
Found Camera Remote Control after some searches - strngely some Sony download sites do not appear to include it as part of Sony Image Data Suite. The European site does tho which was not the first site I searched.
Also the information accompanying the download excludes the A900 and stated the Remote Control Software will only work with the A700 ( see below). It actually works fine with the A900 so disregard the Sony advice.
for anyone interested copied from Sony site :
http://support.sony-europe.com/dime/downloads/downloads.aspx?f=sids_win&site=odw_en_GB'Sony is offering DSLR-A100/A200/A300/A350/A700 users the latest version of α application software, "Sony Image Data Suite" which includes the following software:
* Image Data Converter SR Ver.3.0
Software to view, adjust and save the RAW format still images shot with your camera.
* Image Data Lightbox SR Ver.2.0
Software to view, compare, and rate the RAW/JPEG format still images shot with your camera.
* Remote Camera Control Ver.2.0*
Software to control your camera connected to the computer via USB to shoot images or change the settings.
* This software can be used with DSLR-A700 only.
New Functions and Improvements
* Image Data Converter SR Ver.3.0
o Improvement of operability
o Higher speed of display
o Addition of the peripheral illumination compensation function
o Addition/Improvement of the D-range optimizer, etc.
* Image Data Lightbox SR Ver.2.0
o Higher speed of display
o Enhanced filtering function
* Remote Camera Control Ver.2.0
o Addition of the "interval timer shooting function"* (for Windows only)
* You can use this function with DSLR-A700 with the firmware updated to Ver.4 from here. '