No. No. No. No. No.

Do not port CE assets to stock maps that way.

Compile your map in CE with the new script in it.
Convert the header of the CE map to PC. ( forgot the offset for that )
Open PC Bloodgulch and your CE Bloodgulch in HMTv3.5
Extract the meta for the scenario from your bloodgulch.
Inject it over the meta of the stock bloodgulch.
???
Profit.


If that doesn't work (if scenario meta injection causes problems). Try to PMI Rebuilding to put the scenario in.