Japanese Import Games

[gundamx2]

I recently purchased a Ps2 Japanese Import game, Sakura Taisen. I have a Amercian v.4 Ps2. I tried using the slide card and swap magic cds to try to boot the game, but it doesn't work (apparently, because the sakura taisen cd is a dual whatever dvd which hold 8 gb of stuff or something, but the swap magic cds has a capacity of only 4 gb).

I need a cheap alternative to boot up this original game. Any one have any solutions?

I can't afford a Messiah 2 modchip and definitely can't afford to have someone install it for me, and I don't want to install it myself cause I know it's complicated. x_x

Would a Neo Key (Sbox) plus a Gameshark 2 be able to boot up a original import game?

Let me know. thanks.