Full disclosure: I am the author of OpenPnP.
If ya'll are serious about retrofitting a Neoden 4 with new software, please check out OpenPnP. OpenPnP is a working, Open Source pick and place platform that can be used for nearly any machine.
I don't know of anyone who has done a Neoden 4 retro fit with it yet, but others have done TM-240 (older Neoden machine) retros. We also recently have a Zevatech retrofit and there are numerous examples of people DIYing their own machines with OpenPnP.
Now, OpenPnP doesn't have all the features that the N4 software currently has - the biggest two being bottom vision and conveyer support. Bottom vision is my current focus and will be the next major feature release. Conveyer support is on the list but pretty far down, since few people (in the area OpenPnP usually serves) need it.
Anyway, I thought I'd mention it because there's really no need to develop a new solution from scratch. OpenPnP has a completely modular model for machines and it can be adapted to run nearly anything. I personally think the N4 is a great candidate for a retro fit. It's an incredible hardware platform but it really needs better software to make it shine.
So, if anyone would like to talk about doing a retrofit of this machine with OpenPnP, please come check us out! We have an active mailing list and IRC channel which you can find at
http://openpnp.org/. I will personally devote time and resources to helping make it happen.