Sarah,
Have you done one of these yet on a
Mk4 ibiza 1.8T, just know AMD were freeaking out other it, as it took ages to work, even though it should have been a 5 minute job, They said it was proving as hard as the mk5 golf and i'm not sure what stalk i have, i hink its a VW polo one,
i know i have had a few bad feelings with AMD, but this was a genuine
problem, which they did overcome eventually, and a couple of their guys are cleverish, might be worth checking before the guy pops in for it.