another useless backend: This new backend supports the Relisys Scorpio/Taurus/Infinity VM3552. It should also support (with little changes) the VM4552 and the VM6552. This scanner has also been rebadged as: Piotech Splendeur 3024, Plustek OpticPro 2400SP, and Trust Imagery 4800 SP+. The Trust Imagery 2400SP and 9600SP are likely to be a derivative too.
http://fz.eryx.net/sane/#teco3