Need info on WM6.1 inbox/messaging/POL file location/extension & registry tweaks

[snovvman]

As the subject indicates---

The Diamond is slim on storage memory, so I want to move as much of the messaging storage to internal memory. I already set to store attachments to internal memory under Messaging options.

I have Memmaid & SKTools, they both seem to allow relocation of some form of messaging location. This is what I see:

1) Memmaid adds the following entries with values pointing to internal memory.
HKCU/Software/Microsoft/MAPI/
AttachPath
PropertyPath

2) SKTools added the following entry:
HKLM/System/Inbox/Settings/
AttachPath
PropertyPath

I'm seeing that my SENT SMS go to the directory set under HKLM/Systems/Inbox/Settings, but I can't find the INBOX/RECEIVED messages. The sent messages have *.mpb extensions.

Questions:

1) Where is the file(s) that store the incoming SMS and what is/are the names/extension?

2) Does the setting under MAPI control anything or is it a legacy key?

3) If I create a new email account, which entry governs where all the files are stored?

Thanks!