I would suggest a practice run. So Record a program just under 2hrs. long and that you don't mind messing up to the Philips HDD in SP Record Mode. Once that is done......
(To keep this example simple let's say you want to break the 2hr. program into 4-30 minute Chapters with Thumbs.)
1- Press the HDD button on the Philips remote. This will bring up all HDD Titles(recordings).
2- Use Navigation buttons (Right, Left, Up, Down, OK) on remote to "Select" the program you want to create Chapters and Thumbnails for. Then Press the Rt. Navi button ) and then select "Rename" to rename the Chapter any name you would like ("Test Chapter 1", for our purposes here).
3- After "renaming" and then returning to main HDD Title Menu Screen, Press the Right Navigation ) button on remote to show the options for that title and use Navi buttons to select "Divide Title". Press (OK) button.
4- Use Next Button ( >l ) to move Forward in 5 min. increments and then the FFW/REW or the 30 sec. skip button ) and 10 sec. reverse skip ( if needed to move ahead 30 min. to your first Chapter endpoint. Press the pause button precisely where you would like the 1st Chapter to end and 2nd Chapter to begin. I find it easiest to "Pause" just before where I want to "divide" a Title, and then use the "Next" Button ( >l ) to "frame advance" to the exact spot I want to place the Split.
5- When you are sure you are where you want the division Press (OK) and then Confirm you want to "Split" the Title. BTW, the Prev Button ( l< ) will move backwards in 5 min. increments if needed. Be careful because you cannot "Undo" Splits!
6- Now you are back to the HDD Title menu again. "Rename" the remaining 1hr.30min. of the program "Test Chapter 2". Select "Divide Title" and move forward another 30min. to the end point for Chapter 2 and Press Pause. When you are sure you are precisely where Chap.2 should end and Chap.3 begin Press (OK) and then confirm (OK) the Title Split.
7- Back to the HDD menu we go. Rename the remaining 1hr. portion "Test Chapter 3" and repeat the process moving forward 30 min. to your last Divide point and select and divide as before. Back to the HDD Menue Screen to Rename the last 30min. section Test Chapter 4.
Now we prepare to burn the DVD.
1- Use Navi buttons to "choose" Test Chapter 1. Press the Select Button to add this title to the DVD Compilation.
2- Now use Navi buttons to "choose" Test Chapter 2 and Press "Select" to add to the DVD que.
3- Use Navi buttons to "choose" Test Chapter 3 and Press "Select" to add to the DVD que.
4- Same thing for Test Chapter 4. It is important to select the Chapters in the exact order you want them to play back once the DVD is burned.
5- Double Check the order of the Chapters, then load a blank DVD-RW (for the test a RW would be better since it can be re-recorded later) into the DVD Burner tray. Close the Tray.
6- Press the HDD Button and the DVD Recording will start. When the recording is done, we can now set/choose the Thumbnails we want for each of the four "Chapters" on our New DVD.
1- Use Navi buttons to select Chapter 1. Press the Right Navigation button ) . Select "Edit Title" from the list of options and Press (OK). Use FFW/REW to navigate thru the Chapter until you see the Frame you want for your Thumbnail Image. When you see what you want press Pause.
2- Now use the Navi Buttons (down) to select "Index Picture". Press (OK) and then press the Left Navigation Button ( This will select the Paused Frame and Record it as your new Thumbnail Image.
3- Repeat as needed for all Chapters.
4- When you are done choosing your new Thumbnail Images, Press the UP Navigation Button until you are all the way to the top. Now Press the Rt. Navi Button ) and Select "Finalize" and when that is done you will now have a 2hr. DVD with 4 Seperate 30 min. "Chapters", each with it's own Thumbnail.
You can of course make your "Chapters" any length you choose, and create as many "Chapters" as you need or want to.
It seems pretty difficult reading it, but rest assured it took almost as long to type this as it would have taken me to actually do it. And like everything, it gets easier with practice. Good luck!