NTOSBE Set the following user environment variables prior to launching sizzle.cmd: SIZ_NTROOT Path to the NT 4.5 source root (e.g. W:\trunk.x86chk) SIZ_NTTREE Path to the NT 4.5 binary root (e.g. W:\bin) SIZ_NTARCH Target build architecture [x86, amd64, arm, mips, alpha, ppc] SIZ_NTBLD Target build type [fre, chk]