Do you have a time machine backup?
Did you read the manual?
http://manuals.info.apple.com/en_US/MacBook_Pro_15inch_Late2008.pdf
Page 38 and 62.
You'll have to boot up your machine with the included disks for the reinstall.
WOW! I didn't know 2.5" 10k drives even existed... But so far, everybody's only been testing 7k drives
Seeing as how 7200RPM drives make the MacBook's vibrate (not sure about the Pro's but I'm sure it's the same thing because the build is the same), the 10000RPM would probably make the computer have a heart attack.
Does anyone know if it is possible to put a 10000 RPM notebook drive into the MBP?
Here are the links to two:
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010150380 1035507821&name=10000 RPM