You have to follow in instruction on hackspire
to set up a dev. environment. It can be a slightly difficult task.
Here is a version that should work on OS 1.7. I had to make some minor modifications to make this work. When I tried to build this with the original source, the compilier said some of the functions needed to list all of the .bmp files in a directory are not defined for Ndless 1.7. I had to modify the source and program usage to accommodate this.
To use this program you must do this: Create a folder "examples" on your Nspire. Put both
the document "bmpviewer.tns" and your image, that must
be named "image.bmp.tns" in this folder. Then run bmpviewer.tns to see the image.
I will try to find a better solution to this if I get a bit of free time, but this should work as a temporary solution. Hope this helps!