Blackbox Inno Setup Script

[Adonix]

Hello i have 3 issues,..please fix them and help me.
FIRST :-
In main.iss file i am setting "#define AppSize "1640" "

but when installing game then it's showing "Game Space 1 Gb, Total Space Needed 1Gb"

But my game size is 1.64 gb ,..so please help me to fix the error.
http://i.imgur.com/KaVWxEM.jpg
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SECOND :-
i want to remove nvidia phyx and framework from installing (redist).
help me to disable them and hide that 2 options.
http://i.imgur.com/leNdU7m.jpg
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THIRD :-
i want to change right side upper corner 3 signs to good one.
http://i.imgur.com/2u8HNw5.jpg
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Attaching my main.iss file,..please fix it.
Please help me. thanks gods.