I opened those scripts with kwrite. didn't find any reference to xsnow. I found a file K10xsession with nvidia and ati scrips but nothing about xsnow. Maybe I could just uninstall xsnow rather than try to write a command to kill it. I wouldn't know how to do that anyway. however it seems like the simplest thing to do would be to remove the line of code that starts it up wherever that might be.