I was looking at the memory level stated as internal storage when listing the amount available with LGB, which probably didn't list the ROM memory which according to TB is around 44MB currently.
I know that with Chevy's SS ROM, I wasn't sure how to uncheck lock home in memory as that option was active, but I could not turn it off in options (greyed out). I don't know if that affected my ability to use the script or not. There is probably something I did wrong, but I followed the instructions in the OP and the picture instructions in the post linked from there.
I mainly used the script to keep Screebl and swipepad active longer. I also wanted to keep Timerriffic enabled longer, but I've never been able to get that to work properly on any GB ROM. I have to manually turn the volume to vibrate as my profiles in Timerrific don't stick.