I just found a way to get Rapture to install.
The specific problem I was getting was the Dim Pro error that opened up the browser at the Dim Pro download page and aborted the installation.
I used the updated download file that Ryan had temporarily posted this afternoon and has subsequently been taken down.
I went into the registry and renamed Dimension Pro(by right clicking on the name and selecting rename) to Dimension Gro with the hopes that this might bypass that error and lo and behold it did.
I then ran the install package with Run as Admin and it ran properly and asked for serial number etc.
I opened up Sonar and Rapture was there, and after loading for first time it asked for my Registration number and then worked as advertised.
I then went back to regedit (I had just minimized it during this process) and renamed Dimension Gro back to Dimension Pro.
The location for the regedit entry was (please note that this is on a 64bit machine)
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Cakewalk Music Software\Dimension Pro]
(if you are running on a 32bit machine it Dim Pro entry may be at a different location)
Please note the following cautions:
I am running on a XP Pro 64bit (and X2 is actually working great on it, by the way) so other operating systems may differ.
I had had Dim Pro 1.5 previously installed and did not use the current download.
The installer was run from the downloaded version that was temporarily available earlier today so I don't know if this would solve the problem with the original Sonar X2 install package.
I was getting the Dimension Pro install error box.
Hopefully this may provide some assistance for Ryan to come up with a solution for a quick fix Rapture install program.
Edit Sept 23, 5pm
As Rickpaul indicates in post 101 if you have the 32bit Dim Pro installed it will be at the following location.
[HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software\Dimension Pro]
If both 32 and 64bit are installed you would need to change both reg names.