Hi im new here and i couldnt find this on the forums

i successfully installed bt4 on a 8gb sundisk cruzer blade and it works perfectly
the problem is that i want to be able to load it without saving changes so if i mess something up i could just reboot... but so i would still be able to log with persistence when required to update programs and install stuff

i use the default grub menu that came with the install and i tried to insert the "nonpersistent" flag in there but it doesnt seem to be working :\

i have been googling my ass off im sure im missing something completely obvious but i just cant find it

thanks to any one who can help me edumicate myself