Boot into PCLOS. Open your file manager in Superuser Mode(Nautilus?) Edit the file /boot/grub/menu.lst. There, apply the changes Old-Polack mentioned and save the file.
Alternative method: Open a terminal, and type the following commands:
su <----Enter Root Password
gedit /boot/grub/menu.lst
Replace gedit with whatever text editor you have(
not word processor). Hope this helps!
