from a brief search, it appears to be a 'dialer' .. for info and manual removal instructions, try :
http://www.kephyr.com/spywarescanner/library/mostrardialer.b/index.phtml
or
http://www.inet-mates.com/articles/2_rm_mostrar.html
(hide) Use the Notepad to see what your Profile will look with html tags before submiting your new profile. (Paying members only) (rednaz23) (show all tips)