Trouble with loading sprites.

Greetings. I'm trying to use sprites from a custom sprite sheet and the default one, but I can't figure out how to load the default one so I can use it. Also, if I do

LOAD "GRP4:TEST"
SPSET 1,0,0

LOAD "GRP4:TEST2"
SPSET 2,10,10

The sprites from the first spritesheet are replaced with sprites from the second. I don't get what I'm doing wrong.

You can only load sprites from one sheet at a time. The simplest way is to put all the sprites you want (including default ones) into one file.