Well I worked on my FLR2005 Arranger System for about 20 hours and it sounds fantastic but tragically.....it doesn't work!!!
Kontakt does very very very very poorly when it comes to recognizing and implementing program change numbers. You would need to load the 14GB GM Wavetable 16 times (once for each channel) for it to work. Well even with DFD the best computer would not beable to handle this. Oh well!!!
NI, acknowledges the problem and plan to have a fix for it by Q3, i.e., Kontakt v2.1.
So in the mean time I will use the new version of Kontakt. It has many excellent features & high quality (scripting, effects, sound engine, etc.). From my Colossus Library I can immediately make use of excellent acoustic virtual instruments and amazing drumkits. I will convert my styles to the GM Standard while I wait for all this to be fixed. If it doesn't get fixed there is the Halion route I can take. It does well with Program Changes and can convert Kontakt Libraries to its format. I would rather not go to Steinberg - dongles are idiot things to use for protection - terrible.
I have high hopes that everything will work before the year is up.