Check the contents of the .htaccess file contained in the download versus the one on your site rideshowoff.com/.htaccess
It sounds like you are missing some of the rewrite rules possibly.
Also check your permalinks settings in admin panel.
This will happen if you are missing this for example for video in .htaccess:
RewriteRule ^video/all/([0-9]+)/([0-9]+)/{0,1}$ browseVideo.php?page=$2&per_page=$1 [QSA,L]
RewriteRule ^video/gallery_top/{0,1}$ browseVideo.php?rate=top [QSA,L]
RewriteRule ^video/gallery_top/([0-9]+)/([0-9]+)/{0,1}$ browseVideo.php?rate=top&page=$2&per_page=$1 [QSA,L]
RewriteRule ^video/gallery_top/([0-9]+)/([0-9]+)/{0,1}$ browseVideo.php?rate=top&page=$2&per_page=$1 [QSA,L]
RewriteRule ^video/gallery_tag/([^/.]+)/([0-9]+)/([0-9]+)/{0,1}$ browseVideo.php?tag=$1&page=$3&per_page=$2 [QSA,L]
RewriteRule ^video/gallery_tag/([^/.]+)/([0-9]+)/([0-9]+)/$ browseVideo.php?tag=$1&page=$3&per_page=$2 [QSA,L]
RewriteRule ^video/gallery_tag/([^/.]+)/{0,1}$ browseVideo.php?tag=$1 [QSA,L]
RewriteRule ^video/gallery/all/([^/.]+)/([0-9]+)/([0-9]+)$ browseVideo.php?ownerName=$1&page=$3&per_page=$2 [QSA,L]
RewriteRule ^video/gallery/all/([^/.]+)/([0-9]+)/([0-9]+)/$ browseVideo.php?ownerName=$1&page=$3&per_page=$2 [QSA,L]
RewriteRule ^video/gallery/all/([^/.]+)/{0,1}$ browseVideo.php?ownerName=$1 [QSA,L]
RewriteRule ^video/gallery/([^/.]+)/{0,1}$ viewVideo.php?fileUri=$1 [QSA,L]
RewriteRule ^video/gallery/{0,1}$ viewVideo.php?fileUri=$1 [QSA,L]
You should have mod rewrite enabled by your hosting company. Most due but occassionally a few don't.
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