Hacking Replace drives from different models?

[pustal]

So, it seems my sister's console (Jasper) has a philips liteon dg-16d2s, wich, for what I understand, is unflashable.

I do have my old RROD Xbox, a Xenon model, with the drive flashed, can I just swap it? Of does it have to be the same model?

 

[DinohScene]

Yes, however it won't be safe for Live.
It'll lack the capabilities to respond to the XGD3 and AP2.5 challanges.

All Phatty DVD drives are flashable.
I don't know where you got the idea that the Liteons for Phat aren't flashable, but it's false.