In the Ini file, server are number :
01_FTP=
01_PORT=
...
Its the server 01
I do this for an generic utilisation.
Correct utilisation in irc are : !transfer login pass 01 02 MB
But your site have a name so if you want use transfert with the name of your servers, you must make
if {$Ftp1 == "server1"} {set Ftp1 "01"}
if {$Ftp1 == "server2"} {set Ftp1 "02"}
if {$Ftp2 == "server1"} {set Ftp2 "01"}
if {$Ftp2 == "server2"} {set Ftp2 "02"}
Like that you can make !transfer login pass server1 server2 2000
or !transfer login pass server2 server1 2000. Be careful, 01 in the ini file is the real ip of server1.
Sorry for my bad english