These are quick notes, I will expand them later if I find it necessary. 

1. Get Magboltz source code from http://consult.cern.ch/writeups/magboltz/
2. You will need cern libraries, they are available at RCF. g77 is also available. 
3. Compile:
g77 -o magboltz.run magboltz-10.0.2.f -L/cern64/pro/lib/ -lpacklib -lmathlib -lkernlib

4. Run it. Below is an example of an input cards I have created (see magboltz source file itself for details, onlline documentation is old):

2 1 0 1 0.0

2 8 77 77 77 77

90.0 10.0 0.0 0.0 0.0 0.0 20.0 763.25

135.0 5.0 0.0

0