need help with IRQs / wireless dying

I have strange problem on my computer where any time I turn my USB printer on or anytime my computer makes a sound through the sound card, my wireless internet will die for a second, then (usually) recover. It is very annoying!

My best guess is that this might be an IRQ issue, since I seem to have a whole wack of stuff on the same one (including both the sound and wireless).

My question is, how do I find out what would be the optimal IRQ setup? I don't want to just randomly throw them around. THANKS!

My system:
1.2 GHz Athalon
Motherboard: Asus A7V133
Windows XP

My IRQ list:
IRQ 0 System timer OK
IRQ 1 Standard 101/102-Key or Microsoft Natural PS/2 Keyboard OK
IRQ 4 Communications Port (COM1) OK
IRQ 6 Standard floppy disk controller OK
IRQ 8 System CMOS/real time clock OK
IRQ 9 Microsoft ACPI-Compliant System OK
IRQ 9 3D Prophet NVidia Series OK
IRQ 9 VIA Rev 5 or later USB Universal Host Controller OK
IRQ 9 VIA Rev 5 or later USB Universal Host Controller OK
IRQ 9 Generic 56K HCF Data Fax Modem OK
IRQ 9 Creative SB Live! Series (WDM) OK
IRQ 9 IEEE802.11b WLAN PCI Card v3.0 OK
IRQ 9 Promise Technology Inc. Ultra IDE Controller OK
IRQ 12 Microsoft PS/2 Port Mouse (IntelliPoint) OK
IRQ 13 Numeric data processor OK
IRQ 14 Primary IDE Channel OK
IRQ 15 Secondary IDE Channel OK

If possible, and if you rarely use the modem, how about setting it to use IRQ4?