Sorry, I'm spanish and I didn't understand your post too well. In fact, I have some doubts about what are you trying to do.
- Are you trying to boot a HD image or are you trying to boot a CD-ROM with DosBox? If you're trying the first, DosBox emulates DOS, no need to boot any HD image... you can mount any folder. If you're trying to boot a CD-ROM... Why don't you try to boot your CD from the BIOS?
- Are you trying to boot a DOS partition and load your CD-ROM drivers? You must load a .SYS driver on your config.sys and then start MSCDEX on your autoexec.bat. Get the attachment, and you will get a CD driver (generic, your CD may not work with it).
Your config sys:
<stuff>
DEVICE=VIDE-CDD.SYS /D:CDROM
<more stuff>
You may add some switches... read the readme file.
Your autoexec.bat
<even more stuff>
MSCDEX /D:CDROM
<some last minute stuff>
You can choose the word in italic (to identify your drives) but both words must be the same. Also, if you need to install two drives, you must add two lines per file.
- Are you trying to work with a SCSI or SATA drive? Most drivers in internet are ATAPI or IDE drivers... SCSI drives need their own drivers. I don't know if an ATAPI driver can work with a SATA drive... Also some drivers don't understand very well some things like UltraDMA or PIO modes.