the mk5 rs2000 has a hidious suspension setup at the front.
it runs absolutely no caster so the shock sits bolt upright where it should really sit backwards.
the mk6 was made alot better by the suspension turrets actually being moved back about an inch or more.
if you run anything appart from standard mk5 wheels you can get twitchyness from them.
answer is to try a give the car caster, maybe some adjustable topmounts to set the shock back a bit.
as for tapping i aint sure, tappets?
pm me for more info on the handling