As requested by OrionSR, a timer reset modification has been added to III and VC (both PC) saves.
This is an experimental modification and is currently marked as BETA.
It is expected to possibly fix glitches that cause the games to speed up or freeze during unique stunt jumps.
More information can be found here: http://gtaforums.com/topic/796495-iii-vc-save-file-glitch-detection-and-repair/?p=1067503817
Also, a bug that caused the controls on the modifications panel (download page) to not work has been fixed.