TCmullet
I've enjoyed GameDropFixV4 several times. Thank you whoever developed it
Nice to hear! 
If it is still actual. Today I look and modified your avsi-file to make it work.
You need to insert line with one character "c" in the top of function:
function GameDropFixV4(clip c, bool "myGPU", bool "myDebug", int "myErrSize")
{
c
#myGPU=true
#myDebug=true
#myErrSize=150
...But for some reason the code of GameDropFixV4 work improperly if it situated inside function. In the middle of calculations local variables stop to show real information and contain fake black frames. And I can't fix it because it is mistake or lack of buffer in the avisynth.
So the only way is to use huge script in one file without "function" statement.
---
MT=MultiThreading
Used for speedup purposes for multi-core CPUs.
Official avisynth description of MT
---
And I was wrong about c=last. Sorry 
"c" in avisynth is equivavlent to "last=c" as suggested by Chainik
"c" in avisynth is equivavlent to "last=c" as suggested by Chainik
