Yes - ppm relies on XML::Parser, which in turn needs the expat library. See http://win32.perl.org/wiki/index.php?title=Expat_Hacking for how to build XML::Parser on Strawberry/Vanilla Perl.

I think that ppm has some other dependencies, too - but, unlike XML::Parser, they are all straightforward to build and install.

Yet another (cheat's) method of installing XML::Parser is to download the ppm tarball from Randy Kobes ppm repository (http://theoryx5.uwinnipeg.ca/ppms/x86/XML-Parser.tar.gz), and extract the contents to the appropriate location within your perl installation. ie copy:

1) the entire contents of the blib/arch/auto folder to 
   C:/strawberry-perl/perl/site/lib/auto

2) the entire contents of the blib/html folder to 
   C:/strawberry-perl/perl/html

3) the entire contents of the blib/lib folder to
   C:/strawberry-perl/perl/site/lib
[download]

I'm fairly sure that particular build of XML::Parser (version 2.34) was built against a static Expat library - so you wouldn't even have to bother building the Expat library if you grab that particular distro !!

Cheers,
Rob