i have founded htc, iphone and sammy themed message apps.
i have tested and works with cm9, cm10, AOKP
first;
ICS Blue on black
New style! (Updated 5-28)
Themed Launcher Icon to ICS blue
Themed Send key to match
Made Character count white instead of grey.
Fixed Received bubble to grey so it shows depth.
Themed to more closely match the ICS colors
i tried it on CM9 / AOKP / and RemICS (AOSP) on galaxy SL it has worked.
S2 has the same resolution with S and SL.
i think it might work. just try it but do not forget to backup ur original mms.apk. (copy it to your sd card.)
if it does not work then replace it in system/app and do not forget to give permissions.