http://www.btinternet.com/~ps2rippin...t/newmovie.zip
Found the PS2str on french site i think there's a tutorial in too it's english so don't worry
http://www.netfox2.com/Telechpage/Telech_ps2.htm
Scroll down for the download link is PS2VCD you'll notice PS2str and 2 other tools.
PS: Maybe you can do the opposite of the tutorial.