PC3 question??

Hey guys Im hoping someone can confurm this for me.
Is it possible to map a PC3 disconected from the bike?? Ive got an external power source, maps and program to do it, only thing is I dont have a lap top, just a tower in the study. Dont think the wife would like it if I took the bike into the house.
So I was going to load up the maps before I install it.

Cheers

I believe you can as long as your run that external power source.

Thats what I was thinking to... thanks mate.