try this multimode:
[modes]
; mx=WidthMin..WidthMax, HeightMin..HeightMax,Folder
; OR
; mx=Width, Height ,Folder
m1=400..480,196..320,"480_272"
m2=234..320,400..480,"480_272"
m3=800..1024,400..600,"800_480"
m4=480..600,700..1024,"800_480"
m5=1024..1280,552..800,"1024_768"
m6=600..800,976..1280,"1024_768"
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