:afro: Solved ! But what a pain in the xyz ...
First, I found a very interesting topic here on the forum:
http://www.tasoftware.co.uk/forum/index.php?topic=2868.0
Then I found how to download the patch (NDP40-KB2468871-v2-x86.exe) mentioned by Cristiano (grazie mille !)
Then I was faced with an installation error, the infamous error 643 ...
Then I found what other people had discovered, and come up with:
http://www.2rosenthals.net/wordpress/broken-windows-updates-for-net-409/
http://joehemen.com/?p=14
What Joe Hemen described (thank you !) was enough to fix the error ...
Et voilà !
Plan-G now runs correctly.
Hope this might help others ...
Happy landings and always three greens, y'all !
8)

I won't probably be the first to mention it ...
be it would be of GREAT help if one could taxi with the airport diagram as a moving map, let alone the chance of highlighting the path from a given runway to a given parking spot.
Thanks for giving it a thought.
Eu

Btw, could it be in need of installing the WIC,  instead ?
::)

... uhm ... easier said than done, being an XP machine.
Most download links are uneffective since MS stopped supporting the OS.
I found a 4.5.2 version, but it's "too much" for good ole laptop; I see MS .net 4.0 already there, I wonder what's the suitable compromise in between.
Were you thinking about something specific ?
Thanks.
Eu

... wait a minute.
I enclosed the wrong log and described the previous status (the one before copying the data, when I tried to generate the database across the network and had to wait for hours, and nothing happened, like the other user reported ...).
Now PlanG doesn't ask for database creation anymore ... but data are not displayed nevertheless on the map.
Yet, the checkmarks for displaying NDBs, VORs, etc. have been activated.
New log enclosed.
Thanks,
Eu.

Hi Tim !
I tried this shortcut after reading about it on the manual (section 8.10.4), but - unfortunately - it is not working for me: the PlanG running on a laptop (I used the XP version for it, whilst the flying PC is a Win7 machine, where there are no problems) seems not to see the copied data, and behaves like the database is still to be created.
I thought it was wise to enclose the log txt.
Thanks for the investigation ...
Brgds,
Eugenio