Simple really, load up Afsexplorer then import the balls that u want, it will say theres no room for this file, do u wanna set a new reserved space y/n ? select yes then click on advanced then modify reserve space now look and u will see the file size increased of the file u wanna import which will b shown by red and green colours.
Now click on regenerate afs then save it but u carnt save over sumthing so rename it to sumit else for now eg 0_text.ed. when its dun exit afseplorer and back up the afs file u used to import eg 0_text.afs to 0_text.afs.bk then rename the new afs file u just created from 0_text.ed to 0_text.afs.
Then just load the new 0_text.afs u just created in Afseplorer and import ya balls.
Hope that helps