Since you have a US PS2, you can wait for the US version of the Messiah to be released.... Depending on what version your PS2 is, it may be compatible with the Messiah NOW......
As Charlie said, have someone who KNOWS EXACTLY what they are doing to do the install.... If you are in the US I would rec.
Freedomlives.com. They are located in Chicago..
If you have the money, definately get a DVD Burner..(Pioneer A03 or A04).... Its well worth the investment.....
Oh, if you find that your PS2 will have to have the unreleased US messiah, contact Charlie_PS2 to pre-order it........