I´ve done a conversion of the SST rules for use in Cyberpunk settings, primarily for Ghost in the Shell, using various minis and scratchbuilt mecha. Worked well apart from the sheer deadliness of weapons applied to anything else than a horde of mindless bugs... we tried to counter it by giving multihits to any model in the force, and it worked rather well, but at the end of the day SST is a mass combat system.
The action-reaction concept worked excellently, though, as well as the special movement modes - had my Tachikoma climb a shaft using the climbropes and machine-gun a pesky interloping terrorist on the way up.
If you´re interested, take a look at my "Cyberpunk" gallery:
http://www.dminis.com/Scratchbuilder_Christian/
images.html?galleryId=1685&from=Cyberpunk