Like I said earlier, a hardware mod is the best option. That would ensure a better compatibility & no region locking issues. I, personally, haven't seen any dealers selling Swap Magic DVD's. It's available on the internet though. If he has the latest slim PS2, then the chances of his console going bust are very "slim" by a hardware mod. I have been using my pre-modded console for over a year now & many others have used it for longer that 4 years, without issues.
My advice is to ask him to get it hardware modded.
@techmaster: PM sent, I believe.