My bad, it's not part of continuum.. however, bots and server software use it. You use Vista? Maybe it's built-in or something. I dunno. But it uses these while importing and exporting lvz files: Private Declare Function compress Lib "zlib.dll" (dest As Any, destLen As Any, src As Any, ByVal srcLen As Long) As Long Private Declare Function uncompress Lib "zlib.dll" (dest As Any, destLen As Any, src As Any, ByVal srcLen As Long) As Long Which proves that the library is necessary Now if you need the file or not to have access to these library functions is another question, first time I encounter such thing. Can't find anything about this on Google... hmm... it wouldn't surprise me if it had it as internal library or something, zlib is what the .zip format uses (and the .lvz as well). If Vista can do that without zlib, then I could add a condition there, but I'd like to know exactly why you don't need it first. Oh, and you wasted more bandwidth complaining about it than if you had downloaded it And you probably have downloaded it already anyway, since it comes in the zip file. The splash screen... hmm didn't think about these. I actually had to fix this same problem for other pop-ups. And the thing in the LVZ manager, yeah I know about that, couldn't figure out why it wasn't working... Well I figured the problem, mostly, but no real solution. A workaround is when you click on the field and get the drop-down menu, check your taskbar there should be a new window with no name, click it, then you can choose something in the list... Basically, we have to use a little trick to be able to pop such a menu that can be larger than its container. We use the exact same method to drop down the Regions list in the Region tool's toolbar. A normal drop-down list would not be visible past the toolbar's height. But that one works there :/ Anyway, now that the LVZ selector works, I think it more efficient to change them with it (in most cases). Edit: just checked to be sure, I use XP and I do need zlib.dll; it doesn't crash, but the import process doesn't work at all.