Sorry for buggin everybody, but no-one replied to any email send.'my question posted on wiki' wrote: The convert rail button will activate a drag-and-drop tool that allows you to convert one type of rail to another (rail -> monorail -> maglev). This tool can be used on rail, depots, stations and checkpoints.
QUESTION?! How can you Convert your trains? Do you have to sell them, and then buy maglevs?
(and where do i mail my question to, the next time?)
Retrieved from "http://wiki.openttd.org/index.php/Convert_rail"
So please, reply

I received 1 reply:
mmatthijs*openttd.org
SMTP error from remote mailer after RCPT TO:<mmatthijs*openttd.org>: host mail.openttd.org [81.171.98.110]: 550 Unrouteable address
[*=antispam, duh]