Minimum Speed/Desired Speed is used to determine the number of _engines_, not the overall system speed. This is no good if your mod is QNP-based.
In QNP AIs usage of Misc Ability X Spaces Per One is the best choice:
Code:
Misc Ability 1 Name := Standard Ship Movement
Misc Ability 1 Spaces Per One := 50/multiplier
50 is an example of kt per 1 movement point index. It's usually a constant, to make things easier. So in this case your 400 kt ship will require 8 standard MP to achieve 1 system MP. Multiplier = desired speed of your ship.
Make sure to use this call on top of misc abilities list, else you'll end up with ship without movement. Also be careful with these calls:
Code:
Shields Spaces Per One := 0
Armor Spaces Per One := 0
Majority Comp Spaces Per One := 0
Secondary Comp Spaces Per One := 0
Since they used to fill your ship before misc abilities.
SJ wrote a program which converts vanilla AIs to use QNP scheme.
Second problem: either what Nodachi said, or it's something with design's order in file. Check for double spaces also.
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Ragnarok-X, try to be polite here. You can think whatever you want about yourself, but people tend to dislike boors, you know.
edit: fixed errors