Actually, you should probably go with the 100ma setting for more like 28-32 hours. If manufacturer recommends 14-16 hrs at 200ma, then you would need to double it for 100ma.

Going with the 250ma probably won't cause damage, but it would be better to be on the safe side. Overcharging at more than .1C on initial charges can overwhelm the battery more quickly than if it is below .1C. I'd just play it safe and go with the 100ma setting.

Did the instructions mention fully discharging the pack before charging, or is it already discharged?