The only thing (I) can think of quickly is to filter it through a good olde dos command that can read it wide on the front-end and pump it out ANSI on the back-end, like maybe the "TYPE" command, try this ...

SHELL "%comspec% /c winmsd /categories +ResourcesIRQS /report c:\IRQS.txt
SHELL "%comspec% /c type c:\IRQS.txt >c:\IRQSANSI.TXT"
OPEN(1,"C:\IRQSANSI.txt")
...

Luck,

-Shawn