I've never used Access but here is a trick that I use with Word docs ... maybe you can do a similar thing with Access?
I get a lot of locked Word docs at work. People want to prevent editing. Well, part of my job is revising legal docs so those locked docs really put me out. They're essentially trying to prevent me from doing my job.
I found an easy way to circumvent password protected Word docs:
1. Open the doc and then save it as a previous version of Word document. Like if you're using Word 2000, save it as a Word for Windows 2.0 document. If that doesn't work (it doesn't always) use a older version of Word or even Word Perfect ... Wordperfect 5.1 is a good one.
Saving the doc as an older version of Word/WP usually strips away the password protection. The problem is that if the doc has a lot of fancy formatting (e.g. pictures, bullets, tables) those might get messed up. But it's sure faster than re-typing the entire document.
Once you save the doc as an older version, re-open it with Word and save it as a regular Word doc. At that point, your doc should be unprotected.
2. Open the doc using WordPad and then re-save as a different file name. Again, the formatting might be messed up but the password protection is gone. Also, the product will be an RTF file, not a Word doc ... but it's often not an issue.
I don't know if you can do the same thing with Access, but good luck!