I am sorry but we can't have discussion of cracking software for any reason on our forums.
Regarding your issue, it sounds like there is some sort of missing runtime file OR something else on your machine is blocking the installation of Deskscapes when installed via Impulse.
If you have dependency walker you could run it on deskscape.dll and deskscapes.dll (in the Deskscapes dir) and see if it reports any missing files.
My best guess would be some sort of security software you have installed thats blocking Deskscapes.dll from loading up into memory.
Great
Did not expect an answer after that one ... I ofcourse did not plan to place links to crack sites or try to suggest someone should crack Deskscapes.
I verified the installation with Impulse. It says "DeksScapes 3 is installed correctly". I tried an Dependacy walker and it displays an error for IEShims.dll . I traced it to Internet Explorer and included %programfiles%\Internet Explorer to the %path% variable.
The error is gone. However Deskscapes still refuses to run.
Your computer has a Windows Experience Index base score of 6.6
Your Windows Graphics Experience score is 6.6
DeskScapes appears to be activated on this PC
DeskScapes engine does not appear to be running
(Algemeen PnP-beeldscherm) 1 is attached to NVIDIA GeForce GT 240
(Algemeen PnP-beeldscherm) 2 is attached to NVIDIA GeForce GT 240
Deskscape.dll 2010/01/15 17:19:01
Deskscapes.dll 2009/11/02 16:01:35
DreamControl32.dll 2009/11/09 15:43:17
DeskscapesConfig.exe 2010/01/15 17:19:50
UI\Deskscape.dll 2010/01/11 23:27:33
UI\DeskscapesVideo.dll 2009/11/02 16:01:54
DreamTasks.exe 2009/11/09 18:51:57
DeskscapesVideo.dll 2010/01/11 23:27:22
(BTW i installed the beta, 3.0 has the same problem)
To make matters worse, i have a second installation of Windows 7 on another disk. Clean installation (with ofcourse the same hardware) and it still won't run 
What exactly is "Deskscapes engine". When and how does it start ?