i think, the flying-thing wouldn't be a problem for about 75 to 80% of the game-area of the wastelands. except, of course, for the "not textured" parts of the stuff standing around.
for the example i gave earlier: grayditch DOES only have one entrance, but it's not in it's own cell like for instance the subway-segments are.
you CAN enter grayditch airborn, but it takes the illusion of a medium sized town, that has been hit by an atomic blast.
it would be reduced to "to your left you see the little square with some buildings, and the rest is just there to make it look big."
creating mods usually is a creative process and they are optional.
so nobody is forced to install something they don't like.
i would definatly try a mod like this do decide if i like it ingame or not! =)
p.s.: did anybody ever notice that those 3-armed hovering robots (don't know what their kind is called ingame) have some flamer-fuel in their inventory when killed?
and did anybody also notice, that they dont use a flamer to attack?
would be one of the plausible ideas for fueling a motorbike or an jetpack ingame.
but i guess you could get them to work with vodka, too. =)
or maybe with jet. that would be the perfect thing for a vihicle called Jetpack! =)
Oblivion had the same problem with the Imperial city and someone modded all the cities to become one gigantic cell so there weren't any clipping issues. Trust me, once SDK comes out, Fallout 3 will be a whole lot better game. There's also the likely chance a mod team will remake the world of Fallout 2 using Fallout 3's engine and graphics. They will require making a whole new map and there won't be any clipping issues with that. Don't look at the glass as half empty. Look at it as half full. Just have a little bit of faith in the mod community.
I'm sure it will be modded in, but there will have to be more work put into a motorcycle mod than a jetpack mod. A motor cycle mod is going to need animations added to get on and off the motorcycle. It's going to need driving animations as well that are realistic enough to make people want to use a mod like that. The simpilest vehicle mod to make for this game will be a jetpack mod since it can fly over the "fixed" obstructions on the map that can't be moved. Things like rocks, cars, buildings, etc. Plus there's not much animation needed for a jetpack. Something like this would be sweet and it falls into that "futuristic" atmosphere the game presents perfectly.
Jetpack design from GTA: San Andreas
It wasn't the fastest way to travel in GTA: San Andreas, but the thrusters and animations for the jetpack were very well done.
iirc the jetpack was in the game from the beginning.
but im not very sure on that one.
the "fits the futuristic atmosphere"-part is a difficult design-question that has to be solved first.
putting a jetpack like the one on those picks you posted into the game wouldn't fit.
you need to look at the general streamline-like design of the game. in addition to that, everything is broken and fixed.
and then you have to think about what a broken and fixed streamline-styled jetpack would look like?
my idea would be something like the rocketpack used in "The Rocketeer".
if you saw the movie, you know what i mean. =)