dont know much about os 3,5 but 3,9 comes with a good deal whith uppgraded tools probb.. newer than what ships with 3.5. Picasso 96 is a good choise seems to give better support in some applications that havily require gfx ..and is (if i am not to mistaken) one driver to bind them all easier support for multipple cards etc .and i think you will also need kick 3.1 for the 3,5 the last place i can reamember were i could see a 3.1 rom was amigakit.com