I used Derive 2.something with my HP95 during the nineties. Worked fine and it was the only symbolic algebra system I got up and running on this thing.
I can give it to you as simple zip.
The *.img is no compression but simply a disk imager that puts your whole drive
(a
with all the
(hidden
) sectors into one file.
There are DOS programs to mount such images. Or a Win95 program which I prefer. With Linux it is imgmount.