Fast Start Compressed Header - Compressor

Hello I am using Compressor straight out of Final Cut Pro. I found a nice preset in the "H264 for Ipod Video at 640 x 480".

This is for streaming off our websites and the :30 spots look great.

However with this preset I can not find a place to adjust "Fast Start Compressed Header" so that it does not have to download all at once.

So logically I thought that I would create my own preset based off of their preset.

OK great, well it does not LOOK great at all right. Looks terrible and I believe that it is the Average data rate vs the Maximum data rate. They have a variable data rate 1.5 Mbps to 4 Mbps. This keeps it small in size and looks good. When I build a preset it only gives me the option to a. Automatic bit or b. Maximum bit rate. If I go max at 4Mbps then it way to big.

so I need to know can I either:

1. Make a preset and set a variable bit rate.
2. Take the IPOD setting that they have and make it have a Fast Start Compressed Header.

Below are the settings for both. 1st - their preset 2nd - mine.

(Theirs)

Name: H 264 FOR iPod video and iPhone 640 x 480
Description: H.264 video @ 1500 kbps, progressive, multi-pass. Audio is 44.1 kHz, stereo
File Extension: .mov
Estimated file size: 644.17 MB/hour of source
Device: iPod/iPhone VGA
Frame sync rate: 5 seconds
Video Encoder
Format: QT
Width and Height: Automatic
Pixel aspect ratio: Square
Crop: (L: 10, T: 10, R: 10, B: 10)
Padding: None
Frame rate: (100% of source)
Frame Controls: Automatically selected: Off
Codec Type: H.264
Multi-pass: On, frame reorder: Off
Pixel depth: 24
Spatial quality: 50
Min. Spatial quality: 50
Temporal quality: 50
Min. temporal quality: 50
Average data rate: 1.5 (Mbps)
Maximum data rate: 4 (Mbps)
Audio Encoder
Format: MPEG4
Sample Rate: 44.100kHz
Channels: 2
Bits Per Sample: 16
AAC encoder quality: high
Data rate: 128 Kbps

(MINE)

Name: Preset #1
Description: H.264 video @ 1500 kbps, progressive, multi-pass. Audio is 44.1 kHz, stereo
File Extension: mov
Estimated file size: 1.72 GB/hour of source
Audio Encoder
AAC, Stereo (L R), 48.000 kHz
Video Encoder
Format: QT
Width: 640
Height: 480
Pixel aspect ratio: Square
Crop: (L: 10, T: 10, R: 10, B: 10)
Padding: None
Frame rate: (100% of source)
Frame Controls: Automatically selected: Off
Codec Type: H.264
Multi-pass: On, frame reorder: On
Pixel depth: 24
Spatial quality: 75
Min. Spatial quality: 25
Key frame interval: 24
Temporal quality: 50
Min. temporal quality: 25
Average data rate: 4.096 (Mbps)