Couple of DC Questions

[AreuWho]

Hello, i have some questions about the Dreamcast Selfbooting Methods:

1. Must the bootstrap IP.BIN always reside in the first 16 Sectors of the second session, or is it OK when it's in the last session ?

2. Which CD modes will the dreamcast accept as data-cd (CDROM Mode 1, XA Mode 2 Form 1 & Form 2.....) Is it possible to put more game data on 1 CD if using XA Mode 2 Form 2 Sectors because of less error correction space ?

3. Is there a way to create a data/data format selfbooter without using BIN2BOOT ? I'm asking because I compile DC source code myself and I want to make it accessible for all DC's. If not, can someone tell me what EXACTLY BIN2BOOT does (sourcecode anyone ?) or anyone tell me how the structure of the data/data selfboot disks (including where the bootstrap code is, how the LBA references in the binary files are changed etc..)

4. Will the DC accept disks which have dummy data instead of dummy audio in the 1st session ? (Like Echelon selfboot, except data instead of audio) i think this question relates to data/data format.

5. How can i create a selfbooting cd with cdrecord using a 90 min. CDR ? I already tried the following:

cdrecord -dev=0,1,0 -multi -audio 45000.raw 45001.raw (45000 LBA trick)
cdrecord -dev=0,1,0 -msinfo (I got 45000)
mkisofs -C 0,45000 -o temp.iso <game data dir> (game data is 700 MB)
( cat IP.BIN ; dd if=temp.iso skip=16 bs=2048) > data.iso
cdrecord -dev=0,1,0 -overburn -xa1 data.iso

It burns fine until reaches the end of the regular 700 MB, but not beyond. The man page of cdrecord says most burners only support overburning in DAO mode (i got an Yamaha CRW-F1E with 1.0g Firmware), but overburning an 80 min's CDR to 81 min's worked fine using the method above.

These are my questions. Maybe we could open a thread about Dreamcast knowledge where every user writes down anything he experienced on DC and other users give confirmations if the information is true or not. Just an Idea... The Dreamcast Knowledge Database....