There is no direct way to import threads into this database, but I guess the easiest way would something around creating a table with this data (i.e. excel), in order to dump it into this database using phpadmin for example.
Dunno if it'll work, but probably will.
As for the excel compilation, I have no available time to do it; the phpadmin part I can have a try. If you want, start off by creating a first set of threads and I'll have a go at it.
note: the data structure should be, at least:
| Date | Time | Poster | Subject | Article |
