[chucky]

Yeah, but it's the "mostly" and "I think" that will cause lawyers to start sweating and force someone to do a bigger and more expensive investigation.

[lproven]

DOS is relatively speaking tiny and actually pretty modular. You can delete a handful of files, mostly binaries and some help files, and that's it, code gone.

From the source it's a little different but there's little integration between the bits.