strange...
as fellow hungarian morphers are know well, my system is legendary unstable and nothing works on it:) yet this demo worked for the first time. i decompressed it to ram: then move to hd, runned from there. it was no problem at all and i've run it for several times to check how to get fullscreen (couldnt get it...).
I'll check it out again, try to run it from ram to see if it works or not.