Since there are more people getting problem with GC emulator, Dolphin.
I will provide a tutorial and preferably some faqs.
and this is also my first Tutorial.
Hope it help...

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Introduction==================
Dolphin is an open-source Nintendo GameCube, Wii, and Triforce emulator for Microsoft Windows, Linux and Mac OS X (Intel-based), it is the first emulator to successfully run commercial GameCube and Wii games, and is still the only emulator capable of running commercial Wii games.- Minimum System Requirement
* Operating System: Microsoft Windows (2000/XP/Vista or higher) / Linux / Apple Mac OS X
(Intel version).
* Processor: Any Fast CPU with SSE2 supported (recommended at least 2Ghz). 64-bit is a plus,
since that allows running the faster 64-bit Dolphin builds (which require a 64-bit operating system).
* Graphics: Any graphics card that supports OpenGL 2.1 or DirectX 9.0c[13]Dolphin's Official Website.
The official website for Dolphin, always check it for the latest update.
Dolphin's Twitter Account.
Dolphin also have their own Twitter account.
Dolphin's project site(Google Code). --->Source=======================
Setting Up a Dolphin=======================
* I will update this later as I don't have enough TRUSTED resources at the moment, as well some technical problem. 
==============================
Required System Updates==============================
This
MUST be done first before installing or using any Dolphin emulators..
--> Most of the Dolphin error can be solved by performing these updates :
--> and Updates your graphic card drives.
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Frequently Asked Questions(FAQs)========================================
This FAQs covers :
- I can't hear any sound...
- I got an error message...
- "The application has failed to start because it's side-by-side configuration is incorrect etc"
- "Can't create opengl render. You might be missing some required opengl extensions etc"
- The game won't load or boot..
- The game crashes at certain point
- "Failed to grab 1 GB of contiguous memory! Do you have an antivirus program that ....etc.. etc."
Required System Updates
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Question :I can't hear any sound...SolutionSome 3rd party and MOST 1st party game don't have sound emulated yet.
All you can do is to keep updating the Dolphin and hoping it will work.
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Question :I got an error message...
Such as....
"Error loading DLL Plugins/Plugin_VideoDX.dll"
"Can't init DSP Plugin"
"Can't open Plugins/Plugin_DSP_HLE.dll, it's missing"
"Couldn't init the core. Check your configuration"Solution :Update your Direct X 9. 
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Question :"The application has failed to start because it's side-by-side configuration is incorrect etc"Solution :Update your C ++.--------------------------------------------------------------------------------------
Question :"Can't create opengl render. You might be missing some required opengl extensions etc"Solution :Your graphic card are either out of date or unable/too weak to run Dolphin.
Basically,
Update your graphic card or buy a new one.--------------------------------------------------------------------------------------------
Question :The game won't load or boot..Solution :Always be REMINDED that not all game are supported or compatible with Dolphin.
The only way is to keep updating your Dolphin and hoping it will work.
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Question :The game crashes at certain point...Solution :Since Dolphin is still in development, there will be a glitch or some crashing issues.
Try to tinker with few options in "Config" to enhance the compatibility with certain games.
Below are some examples :
If you enable the "Safe Texture Cache"..
- it fix some games compatibility whilst causing some problems to the other
If you disabling the "Optimize Quantizers"...
- It fix the graphic problems in certain games. E.g, Resident Evil Remake
Or you can just...
- Save and quit the game before it freeze.
- and then, disable the "Dual Core Mode"
- Restart the game, and if it pass the glitch
- Then, you need to save and restart again with the "Dual Core Mode" enabled.
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Question :"Failed to grab 1 GB of contiguous memory! Do you have an antivirus program that ....etc.. etc."Solution :There are 2 fixes, and one of it may work...
Fix #1
- Right click on "My Computer" and select "Properties".
- Click on "Advanced" tab and click on the "Settings" button under "Performance".
- Click on "Advanced" tab and click the "Change" button under "Virtual Memory".
- Select the drive that contains your *game* .iso
- Select "Custom Size" and enter in at least 1534 (MB) for the "Initial Size" field and at least 3048 (MB) for the "Maximum Size" field.
- Click "OK" on all of the windows that were opened. You will then be prompted to prompt you to restart. Do it, then try dolphin again.
Fix #2
- Right click the "dolphinwx.exe" icon and click on "Properties"
- Select the "Compatibility" tab, then under "Input Settings" check the "Turn off advanced text services for this program" box and then press "OK"
- Restart Dolphin and try again.
BUT!!
IF you have a program that is not allowing Dolphin to have the memory it needs, you need to uninstall
the said program...
E.g old version of Kaspersky.-----------------------------------------------------------------------------------------------
* More updates will come!! 