can't compile DeusEx.u

I'm having some great frustrations trying to do what seem to be relatively straightforward edits. As a starting Unreal modder, I'm experimenting with some fairly basic changes, tweaking existing mods to my personal tastes. Specifically, I'm looking to take Biomod, un-REM the XP code from Shifter, and then make a handful of changes to item stats to rebalance the game to my tastes.
My first approach was to use the SDK, find the relevant scripts, most of which are in the ScriptedPawn class.
Problem #1: the SDK crashes with a General Protection Fault when I try to load the base ScriptedPawn class. All other classes (including extensions of ScriptedPawn) work fine.
I figure, maybe I have a bad install? I download and install other copies of the SDK - no luck, the problem remains. Ok, time for another approach. I download the WOTgreal Exporter, and export all the .uc files from DeusEx.u to a folder. I edit the .uc files, delete the original DeusEx.u, run "ucc make"... and supposedly it works. (no errors) I check the directory.
Problem #2:
Turns out ucc.exe is not creating a new DeusEx.u file. I figure maybe I'm doing the process wrong, have the wrong path, etc, so I rename my DeusEx folder (the one with the .uc files), make the same changes in DeusEx.ini, and run UCC again... sure enough, it detects the files this time, though it gives me an error because (of course) the file names don't match. Ok, good, that means my methodology is ok. I reverse my changes. Thinking maybe UCC is corrupt, I download ucsdk.exe, and try that. Same results.
What am I missing? I've spent an entire day off working on this, and seem to be getting nowhere.
Any help anyone can offer is GREATLY appreciated!
My first approach was to use the SDK, find the relevant scripts, most of which are in the ScriptedPawn class.
Problem #1: the SDK crashes with a General Protection Fault when I try to load the base ScriptedPawn class. All other classes (including extensions of ScriptedPawn) work fine.
I figure, maybe I have a bad install? I download and install other copies of the SDK - no luck, the problem remains. Ok, time for another approach. I download the WOTgreal Exporter, and export all the .uc files from DeusEx.u to a folder. I edit the .uc files, delete the original DeusEx.u, run "ucc make"... and supposedly it works. (no errors) I check the directory.
Problem #2:
Turns out ucc.exe is not creating a new DeusEx.u file. I figure maybe I'm doing the process wrong, have the wrong path, etc, so I rename my DeusEx folder (the one with the .uc files), make the same changes in DeusEx.ini, and run UCC again... sure enough, it detects the files this time, though it gives me an error because (of course) the file names don't match. Ok, good, that means my methodology is ok. I reverse my changes. Thinking maybe UCC is corrupt, I download ucsdk.exe, and try that. Same results.
What am I missing? I've spent an entire day off working on this, and seem to be getting nowhere.

Any help anyone can offer is GREATLY appreciated!