Installation problems - launching

[paulhar]

Just paid for and downloaded via the link and received my copy of Penumbra Collection 1.0. Whoo... 1GB, nice fast download speed.

Installed. Started the Penumbra Collection app and got the box with 3 game icons at the top. Clicking on any of them - icon goes red but nothing else happens.

Console shows this:
17/07/2009 15:17:30 Launcher[3955] Button Press <NSButton: 0x146490>::2
17/07/2009 15:17:30 Launcher[3955] Try path /Applications/Penumbra Collection/The Penumbra Collection.app/../Overture.app
17/07/2009 15:17:30 Launcher[3955] LSOpenFromURLSpec() returned -10827 for application /Applications/Penumbra Collection/The Penumbra Collection.app/../Overture.app path (null).

Manually launching Overture by double-clicking in Applications I get "You cannot open the application 'Penumbra.app' because it may be damaged or incomplete.

If I drop into terminal and try to launch I get further:
Coreownloads paulhargreaves$ cd /Applications/Penumbra\ Collection/Overture.app/Contents/MacOS/
Core:MacOS paulhargreaves$ ./Penumbra

Up pops a Serial validation request. Enter my serial, then the screen goes black, changes screen resolution, then drops back to the terminal prompt and screen resolution returns to normal.

Can someone confirm that the 1GB file I got isn't corrupt:
Coreownloads paulhargreaves$ md5 penumbra_collection_1.0.dmg
MD5 (penumbra_collection_1.0.dmg) = 68612d29b8edc593c4881ed32e459609

Coreownloads paulhargreaves$ ls -la penumbra_collection_1.0.dmg
-rw-r--r--@ 1 paulhargreaves staff 1094987327 1 Jul 08:50 penumbra_collection_1.0.dmg

My Mac config:

MacBook Pro Early 2009, Intel 2.4mhz , 9600m enabled, on mains, 4GB DDR3 RAM.
OS 10.5.7.

Regards

Paul