[Dietz]

your idea was not that bad-but I did it the other way round
just have a look which maps from your old install are missing in 1.2, copy them
over to the 1.2 MapMods and add the appropriate line in the all.ini;
BUT make sure that you are not missing any stuff in the static.ini and other ini files
in the STD dir that might be involved;
for example, my old mapmods dir contained several readme files for the various maps
I have added over the time, just consult these for the stuff you might need to add in the inis.
alternatively, just merge the new inis with the backed up ones from the old install;
patience and a basic understanding how the adding of certain mods work are the key here

but feel free to ask thats what a community is there for.....

Before I got this post I went to the now-back-again SAS site & finally had a chance to read the complete install instructios om the 2.1 over mods install ( I hadn't had these before...) they ststed I could install 4.09 over my old complete install & then use the 2.1 with newest 2.4 buttons & changes in STD etc. & all would be well.After one false start IT DID ALL WORK!!!
I can still do a clean install with 4.09 ,AAA 1.2 & 1.2.5 when it comes out & then perhaps import all the aircraft ,maps effects I want plus STD then uses SAS install & get the best of all worlds...but until then I have a working version with everything :my 'old" completely modded Il-2 warts & all,new 4.09 planes,& SAS install & nearly everything is up & operating!