[PD] pdp_pidip_osx package install problems

[robcanning]

Also, I'm trying to install Yves' pdp_pidip package, when i try:

[Rob-Cannings-Computer:~/desktop/pdp_pidip_osx] robcanning% ./configure

configure: error: cannot find sources (system/kernel/pdp.c) in . or ..

when i try ./buildall

[Rob-Cannings-Computer:~/desktop/pdp_pidip_osx/pdp_pidip_osx] 
robcanning% ./buildall
configure: error: cannot find sources (system/kernel/pdp.c) in . or ..
./buildall: cd: scaf: No such file or directory
configure: error: cannot find sources (system/kernel/pdp.c) in . or ..
make: *** opengl: No such file or directory.  Stop.
make: *** guile: No such file or directory.  Stop.
[Rob-Cannings-Computer:~/desktop/pdp_pidip_osx/pdp_pidip_osx] 
robcanning%

I'm sure i'm doing somthing stupid i just can't figure out what :-)

where are these files and folders?

when i stuffit expander decompressed the .tar.gz the following error 
came up:
"...archive was compressed with an unknown compression method
error 17535" (i tried downloading it a number of times)

the uncompressed folder contains 13 items and is 1MB on disk.

can anybody hep me with this?

Thanks,

Rob