As far as referencing files that have spaces in them from the command line:
Immediately before the space add a \ to the end of the previous character string in the filename.
Ex: referencing your file named "Ibrahim Ferrer - Como Fue.mp3" (without quotation marks)
it would be referenced as "Ibrahim\ Ferrer\ -\ Como\ Fue.mp3" (without quotation marks again)
useful tool to use from the command line is the Tab key. If you're not sure how to add the appropriate slashes and so forth to a filename (or to lazy to type out the whole filename - my personal favorite) just enter enough characters to differentiate it from other files in the directory, and press the Tab key.
Ex: to reference your file type in Ibrahim\ Ferrer\ -\ C<Tab> ( where <Tab> means press the tab key) and it should automatically enter the complete the file name for you.
There's lots more handy uses of the Tab key so feel free to use it excessively
A quick link on the Tab key: http://www.tuxfiles.org/linuxhelp/tabtrick.html