As far as I know you need the Dymanite programmer so you can use cas6.7 and the card generator function to change to OS of cards, the OS files for opos and tit2 are in the downloads section.
I've not done it myself with a m2 card though. I would convert it to an opos card since there AU just now and the tit2 is not, unless your in a ex c&w area. But according to that thread above you can convert a m2 into a tit2.
you might want to check first matey. start cas studio/cardgenerator function and inset the card into the programmer to make sure the card is supported.
if it is supported you will have the option to erase the card.
yuo can buy opos1.04 from maxking for about £12 anyway.
dynamite programmer,ive sussed how to write to the card but i dont think i have the right files in tit prog nagra emu are the only files itl let me write
What programs are you using, cas interface or the tit1 & 2 programmer or somthing else. The cas interface hangs on me alot with tit2 cards but the tit1 and 2 programmer never fails.