Preprocessor in Windows Installer

[Nikita]

Hi,

I'm now trying to find an installer for my(windows) application. I've decided that WiX is the most appropriate one.

I need a something like preprocessor also in Installer. For example I want to have a possibility to specify some variables and install files according to these variables.

Unfortunately, I couldn't find this feature in WiX(( Have I missed something??
If not, could you please suggest another installer.

[Jordan]

I like Wise, Install Shield and the MS VS .CAB installer. I know Wise and Install shield have this ability but I am not sure about the MS option.

[Nikita]

Could you please describe in more detailed how it can be done in Wise.

[TcM]

I'm not much into installers but what you are trying to do is for example getting the OS so for example you read the OS into a variable and if the OS is vista it installs certain files, if it is XP it installs other files..etc??

Are you trying to do something like that?