In my DOS days, I used a simple text file that was meant to load into MSDOS' debug program to create a uudecode program. For things like laptops that came with MSDOS, nothing else, and no other way to load things on them. You could use type with a comport I believe to save the code to a txt file and then using debug create an executable binary. Here's one such program: http://www.u.arizona.edu/~shunter/uud.txt

Then I'd use type to save a uuencoded version of something like minicom on the laptop, use this program to uudecode it, and then use minicom to download anything else (Windows 95 install files?) using zmodem.