How do I import mail from Snow Leopard to Lion Mail?

Question

Tried dragging ~/Library/Mail files and folders across.
But Mail insisted on my setting up an accounr (I have several) and put everything into that one account.
Anyone know of a foolproof doc./url or checklist, please, which explains how to get everything that was in Snow Leopard Mail into Lion Mail?
Thanks!

Answer 1

similar "solution" for how to import ical from snow leopard to lion:
1) copy the following files (e.g. from a snow leopard backup) prior to first opening ical:
1a) ~/Library/Keychains/ (folder "Keychains")
1b) ~/Library/Calendars (folders "Calendars")
1c) ~/Library/Preferences/com.apple.iCal.* (ical preferences files, "com.apple.iCal.helper.plist", "com.apple.iCal.plist")
1d) ~/Library/Preferences/iCalExternalSync.plist
2) then open ical in lion ... import/update will follow
if you have opened ical prior to the above steps these files (1b, 1c and 1d ) have already been created, so you have to replace them with your backups from snow leopard described above
if you have set up calendar accounts in system preferences "Mail, Contacts & Calendars" you might have to delete them before applying the above steps
ps:
not quite sure if the following steps are necessary (or did help) for mail/ical import, because mobileme sync works now different in lion (no option for syncing calendars anymore within system preferences—>mobileme) ...
i did a mobileme sync in snow leopard prior to the clean install of lion with:
Calendars
Mail Accounts
Mail rules, Signatures, and Smart Mailboxes