No sure I understand your problem. If you want to pre-set a station to 88.0, just tune to that station and press a pre-set key of your choice until it beeps.
The problem is that I can tune it to stations with only odd numbers like 88.1 88.3 88.5 etc. thats because in USA they use only odd numbers for radio stations so the tuners doesnt stop at 88.0 88.2 etc. I am wondering if there is a way to program it differently.