Migrating Custom Features from SharePoint 2007 to SharePoint 2010

I have been assigned a task of migrating a SharePoint 2007 instance to a new SharePoint 2010 instance.  Unfortunately there is no documentation for any of the installed custom features.  I would appreciate any advice how I can migrate features from SP2007 to SP2010.

I am mainly looking for:
-How to identify solution files and or features that are in this instance.
-How to copy or migrate these features to the new instance.
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macarrillo1Asked:
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KoenVostersConnect With a Mentor Commented:
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KoenVostersCommented:
Export your wsps from your SharePoint 2007 farm with this script:

[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")
$farm = [Microsoft.SharePoint.Administration.SPFarm]::Local
$farm.Solutions | % {
 $filename = ($pwd.ToString() + "\" + $_.SolutionFile.Name);
 write-host ("Saving" + $filename);
 $_.SolutionFile.SaveAs($filename)
}

then deploy them to your SharePoint 2010 farm. Check on your SP2007 farm to which applications they have been deployed.
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macarrillo1Author Commented:
This is what I am looking for.

Sorry for the delay in responding. We have been experiencing some server instabilities that took priority.  

KoenVosters,

With regard to your first post; is the script you provided powershell script? If so how would you  execute it.   With regard to the second post, I was able to assemble all of the wsp, but some of them have additional resources that I need to find. Would the script you provided pull in those resources?
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