Is there a way to remove the hash from combined javascript files in SquishIt?

Question

I'm using SquishIt to combine and minify my javascript files in an MVC 3 project. I'm trying to create an offline cache.manifest and the hash codes changing between edits is killing me. Is there a way to remove the hash that is appended to the bundle?

I checked in the BundleBase.cs class and see a HashKeyNamed method but can't figure out where I would use it.

Here is my existing method for combining:

@Html.Raw(SquishIt.Framework.Bundle.JavaScript()
.Add("~/js/libs/persistence.js")
.Add("~/js/offline.common.js")
.Add("~/js/offline.syncmanager.js")
// snip...
.ForceRelease()    
.WithMinifier(SquishIt.Framework.JavaScript.Minifiers.JavaScriptMinifiers.NullMinifier)    
.Render("~/js/offline_script.js"))