TV CARD RECONISE'S BT878 INSTEAD OF PINNACLE ?

I BOUGHT A OLD STYE PINNACLE RAVE CARD (BIG TUNER ONE ) AND IT WAS USELESS . EVERY TIME I RECORDED SOMETHING OFF THE TV, IT SUFFERED BAD SYNC REGARDING VIDEO/AUDIO .
SO I DOWNLOADED THE BT878 DRIVER FROM THE WEB .
AND OK THEY WORKED BUT TUNER WAS STILL C**P.

ANY WAY BOUGHT A NEW ONE SAME PRODUCT BUT THIS ONE HAD A SMALL FLAT SQUARE TUNER AND DIFFERENT SOFTWARE (PCTV 5 SE V5.10)--PLUGED THIS BABY IN AND WELL THE DIFFERANCE WAS EASY TO SEE .."ITS SORTED"

HAVE I CHANGED THE CHIPSET IN THE TUNER OR THE OLD ONE OR IS IT STILL IN MY REG FILES .

I WANNA SELL IT TO SOMEONE ....WILL IT WORK WITH ORIGINAL SOFTWARE FOR THEM /..ORIGINAL SOFTWARE DOES NOT WORK ANYMORE
PLEASE HELP