Rebuild Language Assessment in .NET framework

We have created a language assessment for use in schools.

This is currently implemented in Flash and deployed from a web site

Due to bandwidth limitations in schools we want the assessment rebuilt as a windows application so everything (video, image, audio, text) downloads at once and can be run whenever required but still communicates with our database.

Once built successfully as a windows application we'd like to move on to getting it running for Macs and iPads. Feel free to quote for this also if it is within your area of expertise

We know there are other solutions to the problem we have outlined, none have proved satisfactory (e.g. AIR)

Please see attached pdf for more details. Deadline is 1st December.

Clear evidence of previous successful implmentation of desktop applications is required.