Minor update

• Decrease minimum PS/VS feature level to ps_2_0/vs_1_1 - this fixes bugs on some odd GPUs, also it was unnecessary
• Assigned more vars to PC registers (PC version doesn't use fixed registers, so no need for "REG_" semantics)

First release

INSTALLATION

• Extract to game directory
• If not installed already, install Visual C 2022 Runtime from here: https://aka.ms/vs/17/release/vc_redist.x86.exe