Normally i compress programs with a lot of doc's (txt, html..) if i compress with ppdm the compression in doc it's really good, but if i compress with lzma....:-(
My question...are you planning to mix this alg's? lzma+ppmd? And the programa detects automatically?
I don't plan it.
RAR does it. Mixing LZH + PPMD.
Sometimes it's not good. And it's not simple to implement.