LDraw: New "All In One Installer" available

[HoMa]

Over at brickset a new version of the LDraw "All In One Installer" (AIOI) was anounced: http://brickset.com/...1-now-available

On ldraw.org the full package is available: http://www.ldraw.org/article/104.html

Before running this new AIOI I have some questions regarding my existing (and working) setup:

1. I have downloaded and installed the latest parts update als complete package a few weeks ago (http://www.ldraw.org...test-parts.html) ... would the new AIOI overwrite this?
   
2. I have downloaded various unofficial parts over the past months ... I want to keep them and does the new AIOI overwrite this?
   
3. I run MLcad 3.4 ... 3.5 is out now. What are the differences/improvements?
   
4. I run LPub 4.0.0.11 ... This seems not to be supported any more and the newer LPub3D 1.2.3.443.2 is part of the AIOI. If I run the new installer, will my old LPub will still be available in parallel to the new LPub3D?
   

These are my major questions. I would be happy about clear answers and experiences of others upgrading a running LDraw setup.

Thanks in advance,

HoMa

P.S. And a big big thank you to all the volunteer workers who helped out to update the LDraw world!

[legolijntje]

As far as I know, things (parts, software, whatever) get overwritten when they already exist. So, when the installer installs for example MLcad in a location that you've already installed MLCad, it will overwrite it. But, it also means that if you've installed software yourself at another location as the installer wants to install it, it will be installed a second time...

The installer is (in my opinion at least) only useful in these cases:

• If you haven't installed anything LDraw related yet. A new PC, or a new user for example.
  
• If you've installed your LDraw tools using the installer and want to upgrade. Because of the reason stated above. Things get overwritten (updated) if they need to, because the installer installs at the same location as the installer
  

Note that I'm not 100% sure about the overwriting/double install. I haven't used the installer in a while now. I just install the things I want myself.