I initially changed all the Rate in the !Setup.txt file. But I found that I was hitting the limit for the weapon refine points, so I reduced all the Mobs by * 10 and reduced the Amount to level by * 10... (Which kept my exp the same.. ) To make it a *64 server, its just the same but you don't reduce the mobs lol...
Its a slightly longer way of doing it, but at least the weapon refine points will continue to work correctly.
So.. what I would do personally is just change the amount per level by a factor of whatever you want in the CD.ini i.e. 64..
1=50
2=100
3=150
4=200
5=300
6=450
7=600
8=850
9=1250
10=3000
11=4000
12=5000
13=7500
14=15000
15=20000
16=25000
17=35000
18=50000
19=60000
20=70000
Would become
1=1
2=1
3=2
4=3
5=4
6=7
7=9
8=13
9=19
10=46
11=62
12=78
13=117
14=234
15=312
16=390
17=546
18=781
19=937
20=1093
And so on.. can be done in Excel in less than a minute if you know Excel.