How do I properly precomile and redeploy these pre-existing websites?

I have three pre-existing websites on our server.  I need to make changes to these websites.  I am not too familiar with precompilation, and these three sites seem to have all been precompiled differently.  Please let me know what I must do to decompile/access the codebehind files, make changes to the websites,  precompile again, and redeploy.  Thank you!  

Website1
- Does not have codebehind (.vb) files
- Does not have a solution file
- Does not have an App_Code folder
- Does not have project files
- Has a Global.asax file
- Does not have a PrecompiledApp.config file
- Has the following in the bin:  Project1.pdb, Project1.xml, Project1.dll, Project2.pdb, Project2.xml, Project2.dll

Website2
- Does not have codebehind (.cs) files
- Has a solution file
- Does not have an App_Code folder
- Does not have a project file
- Does not have a Global.asax file
- Has a PrecompiledApp.config file
- Has the following in the bin:  App_Code.compiled, App_Code.dll, App_Global.asax.compiled, App_Global.asax.dll

Website3
- Has codebehind (.cs) files
- Has a solution file
- Does not have an App_Code folder
- Does not have a project file
- Has a Global.asax file
- Has a PrecompiledApp.config file
- Has the following in the bin:  App_Code.compiled, App_Code.dll, App_Global.asax.compiled, App_Global.asax
BudrophiousAsked:
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BudrophiousAuthor Commented:
I am able to access the codebehind for Website2 and Website3.  
Is there a way to get the codebehind for Website1?
masterpassCommented:
The first thing is make the changes to the site and make sure it working with the localhost as you want it to be.

Now ... In the Visual Studio

Build ----> Publish Website ----> set the path and click on publish and you will have your web site ready to be hosted

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