There's a program called NallePuh that redirects Paula to AHI, but you'll probably find the results less than satisfactory, especially if your software takes over the machine. Chipset workarounds never seem to work too well with the Amiga (Promoting screenmodes in particular). Maybe you'll have some luck with this.
I believe the program is on Aminet.
EDIT: Yeah, basically what Piru said.
