AMIGASYSTEM
That is not my Targa Datatype, though mine will be available within the next few months. Likely that is the one from Frederik Wikstrom. Does is Save Targa?
I'm working on Tiff, Targa, PCX Datatypes and an updated save function for ILBM Datatype. I have an updated JPEG Datatype.
I wouldn't mind testing out your distro for x86. I use VMWare for build systems and VirtualBox for testing.
I'm continuing to update some features of Lunapaint as well. I'll probably post the new 0.6 version somewhere and put a download link here so everyone interested can try it out.