I'm new to this modding stuff, so there might be some minor things wrong with the model. I re-did the LODS, so the doors will actually stay on the helicopter. Also, the holes on the L2 LOD have been fixed. Unfortunately, rappelling and the rear-entry animations only seem to work on the addon version. The replace version has the default animations for some reason but the rear doors can still be opened and closed with a trainer. I will re-release if I can find a work-around. Before installing, you can pick one Addon variant and one Replace variant, which allows you to choose if you want a smoother looking helicopter (with no rappells) or if you want the rappeller that it comes with to function. Or you could have the vanilla Frogger, just with closed doors if none of that other stuff matters to you. Also, I'm currently trying to work on an armed variant called the Bullfrog, which is meant to be usable by standard enemy types (because they don't use certain vehicle weapons against the player), so if that sounds interesting, stay tuned! Other potential projects include: Closed-Door Gen 1 Maverick, Armed Gen 1 Maverick, Swivel Chassis Duneloader, and the HVY Leviathan (ported from GTA:SA, it's in-game, but I'm kinda stuck on it).
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Addon Installation: 
Put FroggerSLL in dlcpacks (mods-update-x64-dlcpacks) 
Then add this to your dlclist.xml: <Item>dlcpacks:/froggersll/</Item> (mods-update-update.rpf-common-data-dlclist)
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Replace Installation: 
Put FroggerR in dlcpacks (mods-update-x64-dlcpacks) 
Then add this to your dlclist.xml: <Item>dlcpacks:/froggerr/</Item> (mods-update-update.rpf-common-data-dlclist)