WabbitStudio Z80 Software Tools

When I split my code into separate files and try to assemble them into binary files I get an errors about labels that it can't find. Is it possible to make something like a header file to make spasm stop complaining? Also once I have binary files can I link them by doing: "spasm file1.bin file2.bin out.8xp" or do I need to do something else, Thanks.

@duneSands yes, SPASM can either output a binary file or link the file itself. The SPASM command line arguments wiki page describes how to link your file.

With spasm is it possible to assemble code into object files and then link them together?

Installed perfectly for me, but some of the features don't work, like the thing that converts decimals into fractions

A user's manual would be nice.

Wabbitemu does not install. Save the program wherever you want it.

Which directory does wabbitemu get installed into by default under Windows/XP? I have it running just fine but there's no sign of it on the start menu, installed programs, desktop or anywhere that "Search / My computer" turns up so the only way I can use it is to download it from the web and re-install every time.
Thanks for your help and my apologies for such a dumb question.