Browsing some Fallout modding sites, I spotted this and thought it might be useful for everyone out there. I don't believe this has been posted here before, but if I am wrong, send this thread to the Vats.
From DjUnique's Fallout modding tools page:
http://modtools.djunique.org/index.php
The default character for the mapper is located in master.dat/premade/blank.gcd which is the file you have to overwrite with your custom character.
Create a new character either in the game or by using the edit obj_dude function (note that the screen fades to black after you're done, so you'll have to restart the mapper afterwards) and save it to a GCD file. Then copy it to data\premade as blank.gcd
If everything went fine, you should now have your custom character as the default test character.
From DjUnique's Fallout modding tools page:
http://modtools.djunique.org/index.php
The default character for the mapper is located in master.dat/premade/blank.gcd which is the file you have to overwrite with your custom character.
Create a new character either in the game or by using the edit obj_dude function (note that the screen fades to black after you're done, so you'll have to restart the mapper afterwards) and save it to a GCD file. Then copy it to data\premade as blank.gcd
If everything went fine, you should now have your custom character as the default test character.