how to boot DVD-R backup with AR 2 V2?

[Gurm]

Yes, it should - but beware places that have Magic and Messiah chips priced very close together.

The Messiah is a nicer chip, it boots everything, but it is RATHER pricier than the Magic. That place sounds like it's selling a clone.

As for soldering in/out - if you know someone that solders for a living or as a serious hobby... then you're fine. If not, then it's a bit tough for a beginner/amateur.

As for chips/mods:

Slider Card = Knife Trick with no Knife. Utter crap.
No-Solder = Stops the CD, but it's just a swap trick with a little help. Lots of games don't work, and lots of games need double-swaps and are a pain.
Magic = Some good, some bad. Poor quality control is why people recommend against this chip.
Apple = My chip of choice. Cheap as a magic, but works good like a Messiah. Only game known to cause trouble is Splinter Cell, and only on V7 consoles.
Messiah = God of chips. Boots all games, every time.

- Gurm