Not being able to force an IRQ is common thing you will see with many products. I always thought (and still do) that is a function of the driver. You should not have an expansion board in the PCI slot next to the AGP slot. Those two slots share an IRQ on most motherboards. My experience shows that you do not want to share IRQs shared by soundcards, network adapters, and display adapters. After disabling all motherboard devices you do not use, try playing musical chars with your boards by moving them around PCI slots until you get a combination that works. This can be more an art than a science and that, unfortunately, is the way it is with plug ‘n prey.
>What is the entry of "IRQ holder for PCI steering" used for?
PCI steering. Description of PCI Bus IRQ Steering (Q182604)
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q182604 (copy and paste the entire link). Larry