Newbie ----> play import-games on mod ps2, please help.....

[dr_schnaggelz]

some weeks ago, i installed the neo 2.2 on my pal ps2. i use it with the dvd region x - codefree.

in the last days i ordererd the original us-ntsc version of metal gear solid 2: sons of liberty.

until yesterday i believed that i would be able to play the us version on my mod ps2.

a friend of mine told me, that it is not possible to play any ntsc original on a mod pal ps2.

now i am not sure what i should believe and what not.
i am going mad.

can someone tell me if it is possible to play the original mgs2 us-ntsc version on my mod pal ps2 or not.
and if it is possible could you tell me how i boot the game.

thanx to everyone who helps me.