RewriteEngine on
RewriteRule ^get-(cs[0-9]+-u[0-9]+-(.*))/?$ get.php?get=$1 [L]
RewriteRule ^go-(cs[0-9]+-u[0-9]+-(.*))/?$ go.php?get=$1 [L]
AddType video/mpeg .mpeg .mpg .mpe
AddType audio/mp3 .mp3