open custom levels folder, now open level data. but the levels in here. now restart jibberish. go to chose mountain and in the bottom right corner it says custom levels er sumthin scroll over till you find the level you want AND ENJOY!
do you have to reinstal because it says jpeg did not load? if so go into the jibberish folder and start from he icon in there. and there isnt anything in the level data folder thats where you put the levels you wanna play