I think you'll find Win32::AdminMisc isn't available via PPM either - at least I can't find it.

ActiveState PPM: http://code.activestate.com/ppm/search:Win32::AdminMisc/

CPAN: http://search.cpan.org/search?query=Win32%3A%3AAdminMisc&mode=all

See this old Perlmonks node Where to find Win32::Adminmisc ? for some tips on how / where to get it.

BTW, I made the switch from ActiveState to Strawberry about 5 years ago and never looked back. The main reason ws that there are MORE modules available on Strawberry due to the C compiler (gcc) and the ability to use CPAN than just available via the ActiveState pre-built PPM repositories.