trans swap

[dolphinsfan1966]

I dont know if any of you have thought about this, because i cant find an old forum about this, but I have an 01 beetle with a 2.0 and an auto trans....my delima is, is that my wife and I like the car, drives great rides great....just a couple little things that need to be addressed such as leaking when it rains but that's besides the point
I want a car that gets better gas mileage than an auto 2.0, cant seem to sell the car so I may as well invest in the car since it only has 75000 miles on it
Is it a huge issue to swap auto to a 5 speed manual since the auto is absolutely horrid at interstate speeds with gas mileage, I've changed honda trans before i know about cv joints, clutch master cylinders etc, my main concern is ecu problems
if someone can help that would be great...

or even a jetta 2.0 transmission since they seem to do so much bettter onthe highway with lower rpms

thanks