When you download these files, rename them and remove the final numbers. For example, rename the corathus_1_4844.txt as corathus_1.txt, and corathus_4850.txt as corathus_2.txt, and on down the list.
Corathus
www.mapfiend.net/soe/corathus_1_4844.txt
www.mapfiend.net/soe/corathus_4850.txt
The Hive
www.mapfiend.net/soe/drachnidhive_1_4845.txt
Dreadspire Keep
www.mapfiend.net/soe/dreadspire_1_4846.txt
East Korlach
www.mapfiend.net/soe/eastkorlach_1_4847.txt
www.mapfiend.net/soe/eastkorlach_4851.txt
Ruins of Illsalin
www.mapfiend.net/soe/illsalin_1_4848.txt
www.mapfiend.net/soe/illsalin_4852.txt
West Korlach
www.mapfiend.net/soe/westkorlach_1_4849.txt
www.mapfiend.net/soe/westkorlach_4853.txt