These are what you can unlock from Fifa 06 Road to World cup and how to unlock them. Theres 6 achievements in Fifa adding to 1000 gamerpoints:

Qualify for the Fifa World Cup (300)
Qualify for the FIFA World Cup in the Road To FIFA World Cup mode.

Win a Custom League (150)
Win a custom league in tournament mode.

Win Custom Knockout (100)
Win a custom knockout with at least eight teams present.
Easiest way is to set it to 4 minutes half, Amateur, 8 teams, knockout stages and 1 meeting.

Win International Open (200)
Win the first tournament (International Open) in the Road To FIFA World Cup mode.

Win on Perfect (50)
Win a match on Perfect. Easiest way is go to a friendly, pick the classic 11 v Liechtenstein and just hold them off until penalties.

Win World Masters (200)
Win the second tournament (World Masters) in the Road To FIFA World Cup mode.