A question about Palm PDA Address Books

Some time ago I updated my Palm Desktop software to the current version (4.14).

I recently noticed that it has the ability to have multiple addresses per contact, so I set about updating my addresses so that they were properly in Work vs. Home. That was all nice. However, when I go to sync, if someone has just a "Home" address (aka the second one), it doesn't get synced to my PDA, since it's address book app only recognizes one address.

Problem is that I have an older Palm unit. I'm using an m515 with PalmOS v4.1. My address book app is v4.0. I looked around for newer stuff, and it appears that the Address Book app stopped at v4.5, and was replaced by a program called "Contacts".

What I want to know is this.. Does that contact app require a Palm OS higher than what I have? I really want to have an updated address book app which will let me sync to all the fields in the current Palm desktop. Am I SOL here? I'd love to get the updated Palm contacts program, but am afraid I'd have to update my Palm to do it. AFAIK, the m515 doesn't have a PalmOS v5 or higher OS upgrade path, right?

So if I can't use the Palm native stuff (which I'd really prefer), is there a third party program that will let me do what I want?

Thanks for any help you can give. I realize it's a stab in the dark by putting this on my blog, but I thought I'd take a shot anyway.