I don't know about the ones in the database. The router database should not be used. Read the announcements at the top of this forum.
The trx file is used for going from stock to dd-wrt. After that you use a bin file.
I'm not sure which build you would use after that. It would depend on wether you have a router with 60k or 64k of nvram.
You also can't use a firmware (build) bigger than 4mb.
If you don't like dd-wrt on the router, to go back to stock, simply download the asus firmware, change the trx ending to bin and use it in the upgrade tab to get back to stock. _________________ I am far from a guru, I'm barely a novice.