I google searched solution as I could not install photoshop cs3 extended on my vista x64 machine.
I found suggested solutions on a number of sites however instructions were not easy to follow
the clearest was on "my digital life"
"The problem is applicable for both 32-bit or 64-bit version of Windows Vista. The solution for Internal Error 2739 problem is to re-register the JScript.dll (or optionally VBScript.dll) module in Windows Vista, as suggested in
Adobe Forums."
"
- Run an elevated command prompt as Administrator.
- For Windows Vista 32-bit user, ensure that the command prompt is at C:\Windows\System32\ folder. For Windows Vista x64-bit, issue the following command to change to 64-bit folder in order to use the correct DLL files: cd ..\SysWow64
- Type the following command and hit Enter: regsvr32 jscript.dll
and optionally (if problem persists),
regsvr32 vbscript.dll - Run the Adobe installer again.