We put in a replacement for splashes, the loading screen and picture textures, so that should explain the size.
The other planets simply don't fit the theme so we left it with the moon only.
Thanks for the info about the waypoints, will fix that.
We tried now to remove all clientside mods we missed but kept Rainbowcraft and ZapApples since those mods contain blocks, items and even mobs, still crashed.
Here's the log: https://copy.com/BcTrrtyWMU29k7Hl