If I have an aftermarket radio installed, can I get keyless entry? Someone tried to jack my car and now the keyhole is getting increasingly difficult to turn. I believe I still have the stock unit somewhere.

 

Why don't you replace the damaged lock? You can buy it from an aftermarket store and take it to a locksmith to get it fitted to the original key that is assigned to the VIN. And yes, you can have an alarm installed to your car even though you have an aftermarket radio installed..

 

...you have a honda and you don't have an alarm?