MagicAndi, thanks for clarifying your question. Seeing as you want to create a WIX setup, I want to add a new answer with some hints on how to accomplish this in the quickest way.
I would recommend using the InstallRite software to get a log of changes done by the installer you got. This tool does not allow you to convert the capture into an MSI, but it gives you a good change log (which does contain a bit of junk). The PictureTaker tool appears to have been renamed and is now commercial - it does allow conversion of the capture to MSI though.
Once you have your log or capture, you can convert to WIX in 2 "fast track" ways:
- Use the dark.exe WIX MSI decompiler (if you have an MSI already)
- Use the heat.exe WIX harvester tool (to auto-generate WIX XML for folders, registry etc..)
If you use the dark.exe tool you should get a complete WIX XML file that you can then compile again - but you should clean it up a bit (take out the UI junk, then link with WIX's detault built-in GUI etc...).
Using heat.exe is the cleaner way. You simply run the heat.exe tool against a folder, and it will create WIX XML elements for you to install those files. You will then need to put it all together in a WIX source files along with other required sections. I can provide you with a basic WIX "minimal sample" to get you going (I don't seem to be able to attach files here).