ambulance with custom skin not spawning

Hello, I am looking for some help here, I have installed a Dodge LAFD Ambulance to replace the standard ambulance, now I have also added a LAFD Ford E450 Ambulance made by PimDSLR, both work fine.  I tried installing a third ambulance, a freightliner pack it was included in the freightliner pack by medic4523 from modification-universe.  When I install his custom dlc.rpf without any vehicles in it my game crashes, no warning, no error message, nothing.  It just closes and goes back to desktop.  Now I started adding the different ambulances and fire trucks one by one.  I have a custom gameconfig, heap adjuster and pack adjuster.  Every vehicle I added so far works fine.  Except for this ambulance, as far as I can tell it has something to do with the skins, when using the skins that are on the released model it works, when I replace the skins with the ones from this pack it just doesn't work.  There are three files for the ambulance and only one YTD file so I only replace the skins in that file.  The released model has 3 different skins so and the skin pack has only one so copied the one skin and renamed them to match the names in the ytd file but no luck, I use simple trainer to spawn it by model name and it says that it has been loaded but it doesn't show up.  Should I use just one skin instead of three, so delete flambo_sing_2 and 3 dds?  I really want this to work because there are not many LAFD ambulance mods out there and this looked great.  So hopefully you can help me figure out what I did wrong.  I if were to delete the second and third skin do I have to change anything about the liveries and if so where do I do this.  I checked the vehicle meta and carvariaton meta and they are good otherwise it would never show up.  It just wont show using the skins, any other skin is no problem.  Anyway thank you already for taking the time to read this and hopefully we can figure it out.