I'm running into difficulties setting up Gehn Shard on a Vista machine.
I ran the gehn_shard.exe and let it download everything for the installation.
After launching UruLauncher.exe, it went through a setup/download process and gave me a login screen. After I log in, it downloads some more updates and then complains that some .prp files are missing. I found a fair number of them to be present, but size zero. So I copied the missing ones over from my MOULa folder. Alas, when I restarted UruLauncher, it replaced them all with zero length versions.
Could it be that some glitch in the server is causing a failure to download selected subsets of the .prp files?
I was having a similar problem setting up Deep Island, but I solved that one by repeating the installation using a fresh install of URU: CC.