in reply to Will Perl Scripts written on 64 Bit Windows run fine on 32 bit as well?

1) I don't know, never tried it on 64bit windows, but i don't think it will be a problem (if you don't have to cope with prebuilt binary modules compiled for Win32)

2) Perl seems suited for that, check the related modules on CPAN and see for yourself, expecially do some quick tests about the memory usage. I don't know what you mean by huge and what you have to do and on which hardware

3) I used it from some web mechanizations (same script took from a linux box), and it worked as on the linux machines