FLONI,
Welcome aboard!
If there's actually a tear in the vinyl, you might want to check the Yellow Pages . . . there are companies that will do this kind of repair to automotive vinyl. The only time I've had to use one was about five year ago for a cut in the dash vinyl on my old Laser; the results were excellent, and I don't recall it being prohibitively expensive (less than $50, IIRC). This would not only stop any further damage, but should make the tear almost invisible.
Also, I believe you can buy vinyl repair kits at most X-Mart type stores (Target, Walmart, K-mart, etc.) and at some auto parts stores. The ones I've seen use a "liquid vinyl" filler and dyes to match for the repair . . . personally, I'd stick with a professional repair if you're at all concerned about how visible it may be; but, then again, I've been infected by the anal-retentive/obsessive-compulsive disease that comes with reading this forum everyday.
Other posters might be able to comment on how well/poorly the do-it-yourself repair might work in your situation . . .
Tort
P.S. You might want to turn the caps lock off for future messages. In general, all-caps is used to indicate "shouting" in Usenet and on forums like this one. Not a flame, just FYI . . .