can any body help me

i have been having problen with the hacks
NEW ONES
well i put them in th combat arms fold er
and i have in stalled the 1.0 thing
but iut doesnt let me install 2.0 Y

Lol, I have some questions for you.

What Is the name of the hack you downloaded?
What's your o.s.?
What is the 1.0 thingy?

If you could answer those question I could try to help you.