For compilation of the IOP toolchain we shouldn't have to download anything new. Your GCC directory structure should still look something like:

GCC
build-gcc
build-binutils
gcc-3.2.2
binutils-2.13.2.1

Just continue with the next step of the tutorial.

IMPORTANT: (this only applies if you didn't build EE and IOP in one go)
In case any compile process throws errors concerning a variable called sys_errlist (it being declared twice) you have to change the file /usr/include/sys/errno.h.

Search for the variable in question and change the following lines to:

/* Please don't use these variables directly.
Use strerror instead. */
// extern __IMPORT _CONST char * _CONST _sys_errlist[];
extern __IMPORT int _sys_nerr;
#ifdef __CYGWIN__
// extern __IMPORT const char * const sys_errlist[];

(you have to comment out the declaration of sys_errlist here. the bold lines have to be changed )