This mod is called Complete Mission Loader, but there are still some things that needs to be done. I opened a bugtracker for CML where everyone can report a bug or request a feature. I will put there beta build as well.
UPDATES
R4: all sidemissions are available! Fixed some crashes - give it a try if it didn't work before for you! The full changelog can be found on the bugtracker. Two new videos.
R3:full changelog, new videos below (simple instruction, R3 update showcase) REMOVE COMPLETEMISSIONLOADER.CS since this release every file will have a version number added (COMPLETEMISSIONLOADER-R3.CS).
R2:opened the room with a printer. No need to update if you don't need to get there.
R1: initial release.