Here it is on github: https://github.com/BleuLlama/TinyBasicPlus/blob/master/Arduino/TinyBasicPlus.ino
The array probably can stay in the external SRAM IC but I am not sure how to access it in the same way TinyBASIC does when using an external SRAM IC. I am not sure how things such as the equals code in the first post would work if the data is external (I can't bring the data into the AVR as it would be too large) . I need a method to use external SPI SRAM as if it was internal RAM, meaning things such as equals (the code in the first post) would work for the external RAM.