Man, I must seem quite stupid to you, I should have seen that for myself, shouldn't I?
So, here comes what I have found, can't say that I do understand very much of it.
lsmod:
Module Size Used by Tainted: P
agpgart 40896 3 (autoclean)
snd 40868 0
soundcore 6276 0 [snd]
af_packet 14952 0 (autoclean)
sr_mod 16920 0 (autoclean)
floppy 55132 0
3c59x 29584 0 (autoclean) (unused)
8139too 17160 0 (autoclean) (unused)
mii 3832 0 (autoclean) [8139too]
supermount 15296 3 (autoclean)
ide-cd 33856 1
cdrom 31648 0 [sr_mod ide-cd]
ide-scsi 11280 0
scsi_mod 103284 2 [sr_mod ide-scsi]
NVdriver 1667200 10
usbnet 15358 0 (unused)
usb-uhci 24652 0 (unused)
usbcore 72992 1 [usbnet usb-uhci]
rtc 8060 0 (autoclean)
ext3 59916 3
jbd 38972 3 [ext3]
lspci -vv:
00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP] (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
Latency: 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Memory behind bridge: e8000000-e9ffffff
Prefetchable memory behind bridge: d8000000-e7ffffff
BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B-
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
This is appearently not the same PCI-Bridge like yours.
Hope you can figure out something. Thanks.