Just a few reminders
1 - You can still get the job done with manual tools if you have one of those little iron "sanders" ( what in hell is the correct word in english?) Lima de Ferro in portuguese ( i know, that doesn't help!)
2 - To get the immobiliser in it without messing the VW symbol you should do as shown here
http://www.cleaned.be/gfx/faq/8/foto07.jpg and
http://www.cleaned.be/gfx/faq/8/foto08.jpg
3 - And as to the final part : the portuguese forum explains how to get the key transponder working with your cars remote central locking. But this is only for Ibizas, Golf's IV and other cars that already came with a factory key that opens the doors at the touch of a button. For the Polo's you would have to change all the locks for those in the MKV for this to work. But you can get your alarm into the keyfob. But that's trickier. I'm still trying to do it myself. Some alarms are a straight fit, other, like mine, are not.
Nice and easy job, good DIY Migui_blu, gracias
Pedro