Copying programs from phone to phone

I'd rather not purchase any external software since I already have a fully working (albeit ugly) solution. I'm just looking for another way to do this.

Maybe I should clarify something, since I noticed I was bit vague defining what I'm trying to do.

I'm not trying to copy some random program that I have installed in my phone. Rather, I'm looking to offer a feature in my program that allows it to be sent from phone to phone. Since I control the DRM-settings of my own code and resources, DRM won't be a problem.

Just thought it should be made clear that I'm not looking for ways to illegally copy programs between phones.

I'm not very well versed with DRM but as far I've understood, you need to somehow classify a file as protected before DRM steps in. However, you seem to have a better grasp of the details so I'm prone to be convinced otherwise.

The only real proof that I have is that I'm working on a program, that has a class that builds a .sis-file from the program components, copying them from all around the filesystem and then packing them into a .sis-file. It wasn't written by me and it's not entirely clear to me exactly how it works, but it does. We've tested the copying many times and it really does work.

Haven't tried it out with those, but I'm guessing they wouldn't copy. The program I'm working on doesn't really have anything that'd need DRM-protection.