IBM eServer x225 - LSI 1030 SCSI - BTX Halted / infinite loop - Need help booting recompiled kernel so i can install

[underligast]

I'm trying to install FreeBSD 7.0 on my IBM eServer x225 (8647-5CG)
(1x Xeon 2.8GHz(512KB), 2x 2048MB PC2100 DDR SDRAM (ecc), 2x 74GB 10K rpm
U320 HDD, Ultra320 SCSI LSI 1030 controller, 48x CD-ROM, Broadcom NetXtreme
10/100/1000 Integrated Ethernet, ATI Rage XL)

The server/drives runs fine under windows 2003 and ubuntu server but the
FreeBSD installation just halts.

I've tried:
CD: disk1 from 6.2, 7.0,
CD: bootonly from 7.0-stable, 8.0-current
Floppys: 7.0

They all end the same, cds with an infinite loop of numbers, floppys with
BTX Halted and a lot of numbers.

int=0000000d    err=00000000    efl=00010006    eip=000219b2
eax=000219ac    ebx=00000000    ecx=c0000080    edx=000587d8
esi=0003e007    edi=00000000    ebp=0008fcbc    esp=00099c88
cs=0008   ds=0010   es=0010   fs=0010   gs=0010   ss=0010
cs:eip=0f 32 0d 00 01 00 00 0f-30 0f 20 e0 83 c8 30 0f
       22 e0 b8 00 c0 03 00 0f-22 d8 0f 20 c0 0d 00 00
ss:esp=90 95 00 00 00 80 fc 00-00 90 fc 00 07 e0 03 00
       00 00 00 00 07 d0 03 00-00 00 00 00 cc 87 05 00
BTX halted

The only difference is when i boot from 7.0-STABLE-200804-i386-bootonly.iso,
or 8.0-CURRENT-200807-i386-bootonly.iso, then i see

BTX loader 1.00 BTX version is 1.02
Consoles: internal video/keyboard
BIOS CD is cd0
BIOS drive A: is disk0

Then it stops.
If i remove both the harddrives i can boot into the freebsd installer,
but as there are no drives, there is nowhere to install.

Atleast when i started with the floppys it detected drive1 and 2 before BTX
halted..
I asked on questions@ and i was suggested to compile and boot a different
kernel on the machine.

There are three ways for me to do this, there are IDE-slots in it so i can
probably find an old IDE drive somewhere and install. I have access to a
rocketraid pci-x card for sata drives (might add yet another problem to the
machine) or i can do it with a usb-attached sata/ide drive. I'm guessing the
straight IDE approach is the best.

What i need to know is how to compile a different kernel, where do i find
drivers for the LSI 1030 SCSI-controller? What i see in the old kernel.conf
for freebsd 6.0 (or is it 6.2) contains
device          mpt             # LSI-Logic MPT-Fusion
device          mfi             # LSI MegaRAID SAS

I have no idea what they are but SAS is serial attached sata isn't it? And
if they're uncommented it should mean that they're active and that they're
most likely actually already running in the kernel i'm trying to boot from
the installation cd? Can i get other drivers/modules or whatever they're
called?

When i've compiled the new kernel, how do i transfer it to a cd so i can
boot the installation with it?

I hope i make any sense with my questions.

Thanks in advance :)