i tried oxios hibernate is the best program for recovery memory i have ever seem, even when my ppc6800 goes down to 7mb i just press a button (i map it to a soft key) and i get a message that the software recover my memory back to 20mb amazing. i guess i won't be deleting mobile shell after all or do a hard reset. this software is free for anyone who want this program,
http://www.oxios.com/memory/