Eprom is the flash memory associated directly with the processor/controller chip. It'd be ok to view the data, but I wouldn't change much of anything. If you're lucky, it'll have an explanation as to what each data value represents, but I'd assume not. If it did, then it might allow you to change the loading speed.

If you have access to the original sketch/code that is loaded onto the board, and a way to load it, then I'd feel more comfortable playing with the Eprom data. If you do have access to the code, you can look through it to find out what memory address the loading speed is kept, and you might be able to change it in that setting.