I needed to copy my installed AIM from a real Windows installation, as I couldn't get the installer to work. AIM doesn't seem depend on any registry entries, so you can just copy the AIM directory.
It seems to work after putting a copy of MSVCR70.DLL in the AIM main folder and a copy of CRYPT32.DLL in ~/.cxoffice/fake_windows/Windows/System
and adding the following to ~/.cxoffice/dotwine/config:
[AppDefaults\\aim.exe\\DllOverrides]
"crypt32" = "native"
There are some graphical permormance issues with the program.