I'm going to release an update which will allow you to easily customise the shipping service names using an updated language file. It allows for multi-language support if anyone wants to implement USPS in other languages.
Also if insurance or other options are enabled it can show on the quote with price being optional. It can be fully customised in the language file.
Making insurance optional is tricky. I'm experimenting with another way of selecting shipping services instead of using tickboxes.
It would be another text area field where a quote option will be entered on each line with parameters. This would replace the tick boxes if it is used. It would allow a flexibility that I cant get with the standard shipping module config methods.
It should allow for every possible combination people would want.
fcm-le,sig (First-Class Mail Large Envelope with Signature Confirmation)
pri-hfp,ins (Priority Mail - Hold for Pickup with Insurance)
pri-hfp (Priority Mail - Hold for Pickup)
pri-lfrb,ins (Priority Mail Large Flat Rate Box with Insurance)
The update with the language file will come first. I'm still thinking about the draft concept above for shipping options.