The headphone like jack on the IR sensor is only needed if you are going to transmit IR. You connect an IR emitter to the jack.
Since you are going RF you will just slap an emitter onto the face of the IR sensor and can hide it behind/under something. Looks shouldn't matter.
Just find the cheapest USB IR receiver. It doesn't matter if it comes with a remote or not. Just don't get one of the Antec solutions... I just don't see the need for FLIRC when just starting out. You'll need the IR receiver anyway to use it so just see how things go without it at first.
If you have access to a Harmony you can program in the Window Media Center SE device and learn all these commands which are compatible with a standard MCE IR receiver
http://forums.logitech.com/t5/Harmony-Remotes-Programming/Expanded-control-for-Windows-Media-Center-now-available-in-our/td-p/374844
Win + - (plus or minus key) Zoom in or out.
Win-
Win+
Win+Up: Maximize
Win+Down: Restore / Minimize
Win+Left: Snap to left
Win+Right: Snap to right
Win+Home: Minimize / Restore all other windows
Win+T: Focus the first taskbar entry
Win+F: Open Windows search
Win+E: Open Windows Explorer
Win+Space: Peek at the desktop
Win+G: Bring gadgets to the top of the Z-order
Win+P: External display options (mirror, extend desktop, etc)
Win+M: Minimize all open windows
Win+1 / Win+2 / Win+3 etc (Hotkeys for programs added to the Quicklaunch)
Win+M: Minimize all open windows
Win+Tab: Flip 3D
Win+Shift+M: Undo all window minimization
Win+Home: Minimize all but the current window
Win + L: Lock the computer
Win + R: Open ‘Run’ command
Alt+1 / Alt+2 Alt+3 etc (Hotkeys for Video card display settings)
Alt+Esc: Cycle through all open windows
Alt+Tab: Switch to previous active window
Alt+Enter: Display properties for the selected item
Alt+Space: Pop up window menu
Alt+F4: Shutdown current window
Ctrl+A: Select all items in a document or window
Ctrl+C: Copy the selected item
Ctrl+X: Cut the selected item
Ctrl+V: Paste the selected item
Ctrl+Z: Undo an action
Ctrl+W Closes the tabs for most web browsers
Ctrl+Shift+Tab: Left Navigation through the web browser tabs
Ctrl+Tab: Right Navigation though the web browser tabs
Ctrl+ESC: Opens the Start menu
Shift+Del: Permently deletes an item and bypasses the recycle bin
Shift+F10: Opens Shortcut Menu