If you go onto Documents and Settings, and then to All Users - while also bringing up your accounts files. Then go into both Start Menu Folders; and then both Programs Folders. Then you can drag all of the Folders you don't want visable in his account into your account's Programs Folder. Then, his account won't be able to view them but yours will. Same with Desktop Icons if you have any in the All Users Profile - generally there aren't though.
A Guest Account will probably have all the games on it that All Users have too - so that may not work.
A Knight is sworn to Honour. His heart knows only Virtue. His blade defends the helpless. His might upholds the Weak. His word speaks only truth. His wrath undoes the Wicked.