Converting EXE to MSI for Deployment

Hello,

I was wondering if anybody could recommend a free solution to convert EXE installers to MSIs for Deployment. There are some I've found, however the straight conversion hardly ever works, and I've found you need to tell the installer creator the location of buttons to get it to create a working one. Does anybody know of any free ones, as the only one I've found that's worked has cost about $200?

Thanks