This will increase the level cap to 255, and increase the perk rate to one per level.

Raises level cap to 99.
(My testing and a couple of comments confirmed that this is a stable maximum level, and no crashes occurred while leveling up to this level.)
This also increases perk rate to one per level.

This mod will increase your level cap to 255.

Raises level cap to 99.
(My testing and a couple of comments confirmed that this is a stable maximum level, and no crashes occurred while leveling up to this level.)

For those that want a greater challenge, this reduces the frequency of perks to one every 3 levels. (Default for New Vegas is one every two levels.)

For those that beg for suffering, this will decrease the perk rate to one every 4 levels. (Default for New Vegas is one perk every 2 levels.)

For those that revel in their own digital suffering, this will decrease the perk rate to one perk every 5 levels. (Default for New Vegas is one perk per 2 levels.)
Note that this means, with the vanilla level cap, only 10 perks can be chosen altogether.

This increases the perk rate to one per level. (Default in New Vegas is every two levels.)