But what you found is a photo of a painting ( not the painting in itself of course ! ) .Somebody took a shot of the painting then put it on the net . He is the owner of the copyright . So you must find who took the photo ! In other words , you have the right to use the photo only if you took it yourself  - you went into the museum where the paintings are exposed and took the photo .
I assume you found it as a jpg format - which didn't exist 70 years ago !- how can it be expired?
It's the same problem with music : a song may be in the public domain like Vivaldi , but the interpretation - the orchestra that played it IS NOT !
I guess that if there is a doubt - there's no doubt ! Use it for yourself - not sure that a freebie would be better .

You should make an INJection  file instead of distributing the obj -I don't believe you have the right to distribute an obj file anyway ! The INJ file are very small files and you can distribute them .
If you want to do this then load your base character , apply the morph(s) you want , dial them then save you final character as a cr2 file in you character library . This file will be the starting point to make an INJ file ( don't forget that you don't have the right to distribute this cr2 file neither !!).
Then you need a software as INJection Magic from Daz . You load your cr2 file then the software will generate those famous INJ and REM files ( they are pose files ) plus some other files that you must put  in the final package , among the 2 files above .

The end user have to copy those files in his pose library , load the base character then click on the INJ  pose and he'll have directly the character you've created !

This is just to show you the main steps 
You can find a tutorial for INJ Magic here :

http://www.digitaldesignsunlimited.com/Market/index.php?act=viewProd&productId=110

There are several ways to create those files - you may even do it  just by editing a text file ! but I think this is the easiest .

Hope it helps !

I had some troubles too with v4 ; I stopped using the "ready boost " function in vista ( i had an USB key for that ) .I have no more troubles now

yes that's it

In fact I have the seam guides but I needed the uvs file that correspond to them in order to use it in Zbrush - I would like to paint the texture and  have no trouble with the seams .The seam is really in the middle of the tights just like  she's wearing a shorty .

Me too I think that is a qustion of grouping .Zbrush is such great soft but it's not "intuitive" for doing such things .

Oh some Erasure , Pet Shop Boys ,Sandra , Chris de Bourgh , Depeche Mode , Enigma
Some nice souvenirs for me too !

The main difference between v4 and v4.1 is the eyebrow as a head part  -try to show it -by default is a hidden part .

Have you updated your Poser to SR 2 ?
Also uncheck in General Preferences "use external binary morph targets".
Hope it helps .

you must have the same number of vertices for the both figures - or bodyparts-  in order for the morph to work ! For ex. you can't transfer a lip morph from Aiko 3 to V4 'cause their heads don't have the same number of vertices .
MM transfers the morph but there is no warning if they have not the same number of vertices - this is why you see the morph but it doesn't work .
The problem with xdresser is that it's grouping parts of the object - for ex. hip and abdomen - so this will change the number of vertices  .You try to inject a hip morph into a hip+abdomen of course it won't work .
That's why I check the option "do not regroup obj" .
What"s the use of a cloth with no morphs in it ?

Before you start conversion go to Options -> Settings... in Crossdresser and under Advanced options tick "Do not regroup OBJ" (other boxes I have ticked are "Copy materials", "Save influences" and dotted "OBJ + CR2").
Sometimes the conversion is not right but give it a try .
I have tried and  it works most of the time  , even if they say you shouldn't do this.

Great thanks this it what I was looking for !