Few questions about ps1, ps2 and game enhacer?

[NooK]

1 - Is it possible to take an ps1 or ps2 from europe (PAL) to USA (ntsc) and use it there with a transcoder or something like that?

2 - Is it possible to use the game enhacer cd in a ps2 to play ps1 backup cds?

3 - Is there any game enhacer for ps2 to play ps2 backup cds?

4 - I'm willing to buy a ps2 but I would like to play ps1 backup cds (cdr) on it so I ask for anybody a recommendation if I should buy a ps1 or ps2?

Thanks a lot for the answers