You would have to be a bit carefull with this, but you could probably take the radio to a dealer that does programming and have them remove the delay and the transmit timeout. You might even be able to get them to do it for cheap or free seeing as they don't have to sit and enter frequencies. You would just need to weigh the possibility of your agency finding out and having a problem with it. Personally I wouldn't think twice about doing it, the way my service works, but i'm sure many others are different.
Our new radios piss me off. My reports have never been THAT long, but they have been set to automatically cut off after three seconds. Combine that with the fact that it's set to make you wait three seconds after you depress the switch before it keys in to prevent us from stepping on each other, you have about twelve seconds to lay out a report before the "BEEP BEEP" comes. You have to let go, rekey (another three seconds) and continue.
End result is that your reports come out sounding broken and disjointed. Even the most experienced medics are complaining about the things, and everyone is just buying their own personal radios to not have to deal with it.