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thanks man, im going to try and make a snowy map like antarctica XD |
Goodluck, make sure you use google/youtube to get some inspiration from

At least i'm doing this almost every time now

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And do you know how to export to fbx with multiple textures cause say if i had on my map dirt and grass texture once i export it into 3ds max it only shows one texture (the first one i assigned) |
You can't export painted models, only elements.. Look at left in bar for LOT, than right click the whole area by making it.
After use Material Seed to put more textures, this method works to have more textures on the map however blendings are something for GIMS in MAX!
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Where the hell is the map?? All I see are cars driving in the air. |
Can you walk on map? If not, you should install the map properly. If you can walk up on it?! Than you can use Photoshop to resize textures...
Or better have GDDR5 RAM Graphic Card it's better for loading enviroments

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Un installed and now i can't play GTA4 at all |
Well i see you have been allready helped, but in future just make sure you make BACK UP's from files you think will need in future!
That would help avoiding these awkward issues..