I need to figure out what the name of my bootloader config file is. I looked in /boot/grub/ and thought I was looking for something like grub.conf. I don't find anything like that. The closest thing is something like menu.lst which I edited and tried appending the string, "psmouse.proto=bare" to the end of the line starting with "kernel" under the MEPIS section. My system is set up to dual boot WinME and MEPIS. Anyway, this didn't do anything for me except that when it boots up the system doesn't seem to understand it because I get some kind of message telling me it doesn't recognize this string as any kind of command. In my case, I am connecting a usb logitech optical mouse to a ps2 adapter which plugs into the kvm switch. I don't understand yet how to follow your suggestion of "getting into edit mode on the boot loader to interactively try it out before editing the .conf file". Any more detail on this would be helpful.