Shoutbox

The Chat Log Viewer from Messenger Plus! can already display the default logs from MSN Messenger and Windows Live Messenger.

So you don't realy need to import anything if you want to view them, just copy all those logs to the same directory as where your Plus! logs are or vice versa. Then point the log viewer to this directory and you can view all the logs (Plus!'s and WLM's).

Note: there is nothing to import or export actually. What you might mean is converting the formats. But as said, that isn't realy needed either as the Plus! log viewer can already view both formats.