How do you add non-Garage band instruments into a Logic project so that you can hear them on playback?

Question

How do you add non-Garage band instruments (orchestral instruments) into a Logic Pro (8) project so that you can hear those insrtruments' sounds on playback?  I've tried to understand and follow the Logic Pro 8 User Manual, but the process comes off as so complex and the writing so technical that it does not help but only confuses.
To be precise - I want to add instruments (orchestral) that are not offered in the current Garage band menu which is offered in the Mixer's channel strip menus for Logic Pro 8.  To be clear, the instruments that are offered are Bass / Drum Kits / Guitars / Mallets / Organs / Pianos and Keyboards / Synth Basics / Synth Leads / Synth Pads.  Most of these that I've tried seem to work and give their characteristic sound when placed in a particular channel and playback is clicked. 
However - there is one orchestra instrument offered in the standard Logic Pro 8 Mixer channel menu and it's the item labelled "Performance - 000 flute 1 or 001 flute 1."  And it is this instrument that presents a problem. When I click on it and choose it from the menu and enter it as the instrument of choice for a specfic channel / track in my Logic Pro project arrangement, when playing back the music for the overall piece this particular track, the flute, does not playback and produce the notes (Midi events) in the track in the sound of the flute.  Instead, nothing comes out at all.  I can't imagine why this does not work.  Any ideas, anyone? Again, when choosing this instrument for a track and clicking the playback no flute sound is forthcoming.  Why not? I have not tried them all, but when most of the other various types of keyboards, such as an electric piano or an organ, are chosen for a track the playback successfully renders the sound of these instruments.  Why then does playback not produce the sound of the flute when it has clearly been chosen to play and sound the Midi events given it?
Anyway, the overall, larger issue for me is the inability I have to choose and get non-Garageband instruments (largely orchestral) to play the Midi events given on various tracks. If my guess is correct then technically, orchestral instruments not offered in the standard Logic Pro 8 Garageband Mixer channel menu are referred to as external Midi sampled instruments - still, IMHO the process is not clearly spelled out in the User Manual.  The simple step by step process whereby a non-Garage band instrument, say an orchestral instrument, is placed in a channel replete with Midi event (notes) waiting to be played should be easy, logical and given in a simple to follow format, but is not.
What with all the talk of routes, busses, auxillary channels, GM devices, GM mixers, audio bins, libraries and audio files this Logic Pro User is confused to the max.  Can someone please help me and, in simple English, describe the step by step process whereby presumably external sampled orchestral instruments can be successfully employed, in any given Logic Pro arrangement project, to render their characteristic sounds upon playback?
On my two Macs, one a laptop and one a much larger Mac, I have any number of the GSO (Garritan Symphony Orceshtra) and Vienna Symphony Orchestra instrument library samples - and yet - I've yet to figure out how to actually get them INTO a Logic Pro project of any kind!  To put this as a question, even as a humble request, how can I make good use of these orchestral sample libraries in a Logic Pro project?  Can someone steer my to a clear resolution of this issue.  I'd sincerely appreciate it!  Thanks all! 
DavidBacon

Answer 1

DavidBacon wrote:
Anyway, the overall, larger issue for me is the inability I have to choose and get non-Garageband instruments (largely orchestral) to play the Midi events given on various tracks. If my guess is correct then technically, orchestral instruments not offered in the standard Logic Pro 8 Garageband Mixer channel menu are referred to as external Midi sampled instruments - still, IMHO the process is not clearly spelled out in the User Manual.  The simple step by step process whereby a non-Garage band instrument, say an orchestral instrument, is placed in a channel replete with Midi event (notes) waiting to be played should be easy, logical and given in a simple to follow format, but is not.
What with all the talk of routes, busses, auxillary channels, GM devices, GM mixers, audio bins, libraries and audio files this Logic Pro User is confused to the max.
David,  you understand that this is professional software and is not necessarily meant to be easy but is in fact designed to give the professional user as many choices as possible, that's why it's in the Pro Apps section. You WILL need to learn about buses, GM Devices, Audio Bins, Libraries...etc..etc if you intend to use Logic.
That said, you are looking in the wrong place in the channel strip.
  May I offer you advice?
Go here:
http://documentation.apple.com/en/logicpro/
Open "Exploring Logic Pro"  (a short PDF Document). Pay special attention to chapter 3. Also pay special attention to the included graphics of the channel strips.
I encourage you to read the whole document as it will clear up many things... even though it's a Logic 9 document.
Post back