Suraj,
A well implemented grid migration can be reasonably transparent to the SAS users. Even changing libnames may not be needed if you are in a pretty structured environment to begin with. Your biggest change may be how you submit the jobs themselves, especially if you are currently submitting in batch.
JuanS's comments were about doing it yourself. In a word, don't. That's why you have SAS admins. Part of their job is to provide guidance documents to address the local changes the grid brings about.
Besides load balancing, the SAS grid can allow you to get much better performance with the HP procedures. Some SAS BASE procedures are 'grid aware' so you can get a performance improvement without even tweaking your code.
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