If a PC decides to drop his/her character and become an NPC, does the subsequent NPC have the same skills as the former player character? And what class does the new NPC fall under (custom,builder,rifleman,etc.)?
The NPC will have their race attributes carried-over, as well as following the normal custom NPC rules:
3.2/ Custom NPC
Custom NPCs do not get any pre-set class skills. Instead, they receive some Skill Points (SP) that must be assigned in their skills by the players, using the regular skills rules. Custom class 1 NPC get 5 SP, class 2 get 7 SP, and class 3 get 9 SP.
Note: The NPC will not have the same SPs as the character did prior to dropping the character; if you had a 5 in strength, the NPC will not have the same.