Importing has been tested only with ICQ 2000, some test has been made with ICQ99 and ICQ2001. ICQ98 is not supported. Importing can be a lengthy operation, it can take lots of minutes, it depends on your system speed. On my K6 350Mhz it gets 100 messages/second without the "speed up" option and 1000/second with the option on. The “speed up” option keeps all messages in memory instead of writing them to disk. This speed up the process about 10-15 times. It eats about 1Mb for 10'000 messages. Memory is freed when importing ends.