Nero vs. PrimoDVD...and More

[id10t]

I've never actually backed up a DVD game yet...but I'm curious...
Which is better to use...Nero Burning Rom (5.5.0.10) or PrimoDVD, and why???
Also, I recently burned a backup copy of The Blair Witch Project on a DVD-RW with Nero, using DVDXCopy and my Pioneer DVR-104, and the DVD-RW which was included with it (not sure what brand)...but when I put it in my PS2, I get a disc read error...why??? I don't have my modchip yet, should be here on Wednesday, but I've been told that a PS2 does not require a modchip to play a DVD-RW movie...