Solving IDL PKUNZIP and PKZIP Issues on Win 7

[swartzism]

Heads up: I am working in IDL (which I have never done before)

I am trying to get old code which works on a 32-bit machine to work on 64-bit and am having trouble with PKUNZIP and PKZIP which aren't compatible with a 64-bit OS (Windows 7). I have 2 executable files, PKUNZIP and PKZIP, which are used in the IDL code as

cd, skypath, current=thisone
spawn,'del skyfiles.*'
spawn,'del unpack.zip'
spawn, 'rename '+zipfile+' unpack.zip'
spawn, 'pkunzip -o unpack.zip'

...

spawn,'pkzip skyfile.zip skyfiles.rad skyfiles.trn skyfiles.dep skyfiles.uwr'
spawn,'rename skyfile.zip '+'SKY'+zipfile

Since PKUNZIP and PKZIP don't work, does anyone know of any alternatives that can? I've tried WinRAR and WinZip, but I couldn't get them to work. I believe that they wouldn't work due to the fact that they open a GUI which asks where to unzip rather than simply unzipping to a folder named in the IDL code. Does anyone have any experience in messing with stuff like this?

Thanks in advance.

 

[swartzism]

Fixed it. Downloaded zip and unzip with Cygwin, tar'd their folders and included a shortcut to the executable files in place of PKUNZIP and PKZIP. Works fine (if cygwin1.dll is included in the same directory as the original executable)