It would seem that you have chosen a very challenging endeavor. There doesn't seem to be alot of info about this camera working with Linux but I have posted all I could find. I don't know the first thing about a Trust Spyc@m but it might be interesting to learn. I have seen that some Trust cameras use these drivers:

spca504_flash
stv0680

Which ones have you installed?
Have you tried the USB mass storage driver?

Here are a few links:
http://webcam.sourceforge.net/
http://alpha.dyndns.org/ov511/cameras.html
http://www.teaser.fr/~hfiguiere/linux/digicam.html

I don't know but you may have seen all of this already. Perhaps searching by the chipset and/or vendor & product I.D. would be beneficial.

gluck