How to restrict Android users to launch some applications?

[Bebul]

We want to develop an application which should be the only one our users should use. So we need to PREVENT them using other applications. (Mainly to make the maintenance support possible - we plan to buy at about 1000 phones, so the maintenance is tough task!) Is there any way to restrict the users?
For instance, is ADW Launcher able to do such things? Or is it possible to achieve this by coding our specific replacement of Home Launcher? And what about using some ASE scripts?
I am a beginner to Android OS, please do not assume any specific knowledge in your possible answers ;-) We have currently no idea at all.

 

[Loch]

Far be it for me to tell you what to do, but as someone who has worked in the tech field in the past, I would suggest if you are buying 1000 phones....you might want to contract someone who is an Android Expert rather than searching around on public forums for answers like this.

4 or 5 phones is something that can be managed by someone who does not know what they are doing, I think 1000 is a bit much to manage that way.