Hey Notaz, When it comes to zipping iso's, I actually don't recommend it because it causes very long load times (some almost lasting 10 seconds) with it trying to decompress data. Is there any way to make this not load so long? If not I guess that's alright because the cso format is pretty cool alternative option. I do want to report a bug I noticed and hopefully will be fixed with a patch:
Once you compress a ISO into a cso file, it saves you tons of considerable space which is a plus and no decompression seems to be used (no decompressin file/ loading screens). My bug I'd like to report doesn't happen when you load up a ISO for the first time (no save file, never played before) but this annoying bug pops up after you reset the game or re enter the game (exit emu and return to emu to play game again.) A doctor Robotnick pops on screen immediately saying my sram (or is it bram?) isn't innitiated? Funny thing is... he never pops up when...
1) Iso (not cso) is zipped in a zip file and played
2) Regular Iso is played
3) Once I reformat my Sram and reset game (cso format)
I would love to save alot of space on my memory stick but not run into this Robotnick Character before I even play the game. I do have to say that I only tried Sonic CD when I found this bug, I didn't try other cso files.