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!