Question about compiling in Eclipse

Hi, eveyone.
I just bought the TGE license and was trying to compile everything in Eclipse. I followed the isntructions (exactly-- even using the versions of each piece of software as they are listed) at:
http://www.garagegames.com/mg/forums/result.thread.php?qt=15205

However, I keep getting the following at step #7:

make -f mk/configure.mk OS=WIN32 BUILD=RELEASE COMPILER=GCC3
ERROR: COMPILER variable not set or is an illegal value

Current Configuration: this config is INVALID
OS: WIN32
COMPILER: GCC3
BUILD: RELEASE
DIR.OBJ: out

To change the current configuration type:

make -f mk/configure.mk {arguments, ...}

required arguments:
OS={WIN32 BEOS LINUX}
COMPILER={CW6 VC6 GCC}
BUILD={DEBUG RELEASE}

Now, if I change it to "COMPILER=GCC", everything goes well at this point, but when I actually attempt to build, it initially has no target for the GCC make file. I have gone in and changed the GCC3 makefile to a GCC makefile, but have continued to get other compiler errors (that I have not attempted to resolve yet). Am on the right path here, or is there another (simpler) solution that I am missing?
Thanks for your help in advance!

Robert