more hints needed

[Peter Hallinan]

Thanks to everyone who responded to my earlier questions.
Sorry I have so many of them, I'm pretty new to redhat/gnustep/etc

So I now have the GNUstep core packages built and installed under redhat 9.

My goal to compile and test an audio signal processing project developed 
under MacOS X that is quite large (~ 10 frameworks).
It has both a command line tool and a graphical app, but for now I can 
get by with just the command line tool.
Before I build a complete GNUstep developer's environment, I'd like to 
see how well it compiles.
(If the port is a major deal, I'll delay until I have more time, but the 
committment still stands :)

My questions:
1) will ProjectCenter accept ProjectBuilder's pbxproj files, or do I 
have to go through some conversion process?

2) what's the best way to compile ProjectCenter? The instructions in the 
included INSTALL file differ from those on GNUstep build guide,
and neither seem to work, eg
[root@AlpaMayo ProjectCenter]# make 
GNUSTEP_INSTALLATION_DIR=/usr/GNUstep/System install
GNUmakefile:28: /common.make: No such file or directory
GNUmakefile:48: /aggregate.make: No such file or directory
make: *** No rule to make target `/aggregate.make'.  Stop.

3) has anyone successfully compiled the sound and math kits (from 
sourceforge) before? these will be my initial test cases

4) I read somewhere that frameworks don't port so well. Is there 
anything i need to watch out for here?

5) Any other advice?

Thanks,
Peter