Help with multiple emails

[42possibletrash]

Hello, I'm new to mutt and in the early stages of migrating over from 
Eudora OSE. My problem is the lack of obvious support for someone with 
several email addresses. I have four email accounts, for which mutt will 
work well with one at a time, but I have no method of swaping. Please 
note that at this time I have not configured any program to receive my 
emails and am only concerned with moving my emails over to be viewed on 
mutt. My .muttrc: http://ompldr.org/vYXUxZQ. When researching this 
problem I came to the conclusion it should be possible to write a macro 
to swap from one email to another, e.g. <F1-4>. However I am not 
convinced this would be possible now as I am aware each email has it's 
own mailbox, e.g. '/Main', with it's own subdirectories, e.g. '/Inbox'. 
This complicates matters as the script used to find mailboxes is static 
and does not rely on mutts own internal vars, e.g. '$folder'. I am at a 
lose, and would desperately appreciate any help possible.
  I have looked for an answer online but failed. To clarify what I want 
is to be able to swap email accounts within one session of mutt, 
possibly using a set of macro bound keys. I was using mbox format within 
Eudora, but have decided to move to maildir, the conversion seems to 
work perfectly. I have also started this thread online, but 
unfortunately did not get a lot of help: 
http://forums.gentoo.org/viewtopic-t-898276.html. Once I have mutt 
viewing each account properly I will then configure it to receive and 
send emails. Thank you in advance to anyone who can help me. :-)