Sorry, but from the previous mail I didn't understand that you always had a .s19 file.
Now, the question is: what kind of bootloader are you using? I suppose you are using the embedded bootloader provided with the test tool (correct me if I'm wrong).
If this is the situation, so, in the menu
edit you could find
projectName settings..., click on it and you will see a window with the settings of the project. In this window select
Compiler for HC08 (in the left pannel) and
in the command line arguments you can add -DBOOTLOADER_ENABLED (is something like a define in the main program).
But, if you have doubts, you could read the 802154EBRM.pdf, this is the reference manual for the embedded bootloader.
Regards