hellhammer

I have mortal kombat project 4.9.6 and I need to know some basic things I need to konw 1_ How delete chars ? 2_ how delete stages ? (I solved deleting the two files in stage file) 3_ How can I fight more matches? There are a lot of oponent but there are only 9 fights including shao khan in arcade mode 4_ How to add stages ?? I found new ones for mk project in internet 5_ How to add chars ?? I tried eveywhere to have some information but it seems mugen mk is not very popular. I tried to contact user Compiler the author of the mk p 4.9.6 I couldnt