ok, dwanthny i took your advice and did an internal format, all well, then i put the ebook applications software on. it works but its difficult to find the book you want to read as you can not sort via collections or anything, you can only browse the disk structure like a computer window. also, strangely, the 505 now freezes on pretty much any book format eventually (Only on this firmware) it can even be the sample book they included -oliver's Twist- it can be ten to twenty minutes and then the pages will refuse to turn and no other buttons work, only thing i can do is use the reset pin and slide off and on. I shall try the other firmware you suggested.
P(r)S : does it offer any different formats than normal? it doesn't need to as im fine with the reader's normal capabilities. its only that the other slightly freezy firmware offers a host of other files you can read.