As everyone knows, Philips was the developer of the SVCD standard.
Since I-Author uses a different standard, SVCDs with switchable subtitles made with this program will NOT run on a Philips standalone DVD player.
I couldn't believe thet there was no solution from Philips to the subtitles problem and after many hours of research i found this site:
http://www.licensing.philips.com/ordering/soft/documents199.html
There, you can find a tool from Philips that claims to author SVCDs with switchable subtitles (up to 4 subtitles !!) that DO WORK on Philips players.
I haven't tried it because it runs only on NT4, wich i dont have installed(and i'm to lazy to install right now). Although i found a guy who made a "patched" .dll that is suposed to let the program run on XP, i couldn't get it running.
If anyone has luck (and good results) using it, please send me a mail to let me know how it works.