How to combine 2 vob files on 1 disc

I have a sony dvd handycam and film my sons football games. i get around 30
minutes at sp quality. i use one 3in disc per half of game. after
finalization both discs files have the same name. i would like to combine
them on one standard disc. can i rename them and still have a dvd recognize
them. each disc has one folder named video_ts. in that folder are files
video_ts.vob, video_ts.bup, video_ts.ifo, vts_01_0.ifo, vts_01_0.bup and
vts_01_1.vob. i have tried third party software and it does everything except
combine the 2 discs into 1. Also is there a driver that will allow you to
read unfinalized sony discs? they are mpegs but are not recognized by my
drive.