my texture cache options in rage shows “Undefined” and i can't change it.

Thanks.

Edit: i think i found a workaround by reading the the other topics and some google search. I made a new text file called rageConfig.cfg and put it in the Rage base folder with these 4 lines:
vt_pageimagesizevmtr 8192
vt_pageImageSizeUnique 8192
vt_pageImageSizeUniqueDiffuseOnly 8192
vt_pageImageSizeUniqueDiffuseOnly2 8192
works great >< but i can't change the options still.