Update: today I ripped apart my trunk for yet again another attempt at cd changer emulation on my 2006 MKIV. It did not work as of yet.
On the other hand, I updated my firmware and kustomizer and was able to control functions in my vehicle for example fog lights, tail lamps and wheel controls. A huge leap from where I was before. I have noticed some bugs for example, if I test any lighting feature, my speakers will crank up louder. I attempted reading live bus data from kustomizer with a 100% success.
I haven't been able to use pa soft or nav coder with kracker yet (possibly because I've connected through the trunk.
1. Work on the changer emulation for MKIV navs as soon as possible!!!
2. Have kustomizer tell you what mode you're currently in.