i have not seen ADNM deployments work on 2008 or Win7, ADNM has not been build with those 2 OS's in mind and yes they differ a lot from 2003 and xp.
Best is to use MSI installer
There is ADNM v6, its called SBC, its a new product and it depends on how big your environment is that you want this.
see the Business Protection
Rumors have been around that there will be a v6 connector for ADNM but as far was we know here those are still only rumors and the release date is somewhere between now and when hell freezes over