0.5 was the featured mod on d3files.com for a while, 0.5b was just a few fixes that were pointless, 0.6 i cleaned up everything, so it feels more complete and a better game if you use the mod,
not much else to do, with out the sdk, the only thing i could do with changing is the oxygen use rate, which i cant find anything to do with oxygen nor vacuums, except for the editor, if the oxygen rate was 4x slower its would make cold breath complete
watch a avi of 0,5 with pure gaming skills if you have xvid
http://irgoslak.org/downloads/demo.avi
got my teleporters working again in 0.6