Roller Coaster Tycoon 3 Platinum won't finish installing.

I first install Roller Coaster Tycoon 3, then I put in the Platinum edition, and it asks me if I would like to delete to the software or something, if I say no, the installation stops, so I have to. After that it asked me if I want to delete my saved games, I can say yes or no to this, doesn't affect installation.

Anyway, it gets 85 or 90 percent done, and then the installation stops at "C...InvTiltedmedslopeMedcurveRight2medslopemedcurve

So I cancel the installation and I see that the normal Roaster Coaster Tycoon is erased from my computer.

Now it just gave me a transfer feature error.

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