[Jay_83]

I've got the pal versions of
FIFA 2005 & NBA JAM and both work fine on my v7 and NTSC v12.

Which version of Swap Magic discs are you using? Black and white ones? which say 2.0 when booted.

or

Blue and white ones, version 3.3.

If you're using the 2.0 they're old school now bud, have been for nearly 6-7 months. The 3.3's were brought out to combat the few games that didn't boot with the old discs.