My favourite SL/ASL scenarios were The Streets of Stalingrad (Guards Counterattack and Tractor Works combined), The Road to Wiltz, Hill 621, and The Paw of the Tiger.
I converted all these maps to CMx1 but did not post them because I did not use forums at the time and was concerned about copyright. I regret that now . The reason I regret it is because I put in a huge effort to re-model the terrain to work better with the CM game engine (and to simply look much better), while keeping the forces involved as close as possible to the original scenarios. These creations should have been shared with the CMx1 community.
I play-tested these scenarios endlessly with my son and the result was a howling success I must say. All the scenarios recaptured the intense excitement we all felt when first playing Squad Leader/Cross of Iron (not ASL). I agree with the previous comments about simple map conversions being a disaster - it takes literally days to remodel a Squad Leader map to a realistic and enjoyable CM battle. Unfortunately I got rid of my CMx1 games and scenarios when CMx2 came out, oh well.
Anyway, I plan to recreate Hill 621 in CMx2 - perhaps this Xmas, , it's one of the great enjoyments of CM/CMx2, the Scenario Editor. Ciao.